Tag Archives: CPM REX121

Spyderco Chaparral REX 121 – First Impressions of the Orange Empress !

I’ve reviewed quite a few members of the Spyderco Chaparral family over the years, so I thought I knew pretty much what to expect from another variation of this compact gentleman’s folder. But this new Chaparral, featuring REX 121 blade steel, has made a particularly strong first impression.

Because… Spyderco is doing more than simply introducing an exceptional steel into a small gentleman’s knife. The company is positioning this Chaparral among its most premium offerings, with a price tag that even exceeds those of previous titanium-handled variants !

By the way: a big thank you to Golden as I received this stunning Spyderco Chaparral CPM REX 121 as part of their Ambassador Program. As always, my reviews reflect my own experience and honest opinions.

Right out of the box, the first thing I noticed was the outstanding quality of the action. Everything feels exceptionally smooth, precise, and refined. As expected from Spyderco’s Taiwanese production, the fit and finish are simply superb. There is absolutely no blade play in any direction. The action is buttery smooth, while the blade itself is razor sharp. Everything feels exactly as it should.

And that’s just as well, considering the price tag: it costs more than three Lightweight versions, which are already masterpieces of EDC design.

This Chaparral isn’t just the queen of the family. It might very well be the Empress of all Chaparrals!

And actually… As I hold Her Orange Majesty, there is something else about this particular Chaparral that sets it apart, something harder to put into words.

It feels denser, more substantial in the hand.

Perhaps this impression of greater density comes just from the fact that I’ve handled the mighty Lightweight Serrated version so extensively. I’m so used to its featherweight feel that the REX 121 version feels more substantial in comparison. That’s probably all there is to it!

But really, compared with the other Chaparrals I’ve handled, this one feels noticeably more substantial in the hand. Its slightly rear-biased balance gives it a reassuring sense of solidity, allowing the knife to sit naturally and securely in the palm.

And then it hit me: this is my very first G10 Chaparral!

That realization actually means something, because the Chaparral Collection has always been about more than just being a great little EDC. Sal Glesser conceived the series as a platform for exploring different handle materials, rather than different locking mechanisms, which is the territory of the Spyderco Sage family. Over the years, we’ve seen Chaparrals in carbon fiber, FRN, wood, Titanium and various other materials, each bringing its own character to this remarkably slim design.

Yet somehow, until now, I’d never owned a G10 version.

And what a difference it makes! G10 has a distinctly different feel from carbon fiber or FRN. It gives a knife that unmistakable workhorse character: solid, purposeful, and ready to be used without ceremony. It’s not merely about appearance or exclusivity; it’s about the way the knife feels when you put it to work.

This Chaparral isn’t a gentleman’s knife designed to sit pretty in a collection. It’s a performance-oriented EDC, built around an exceptionally thin blade and one of the most extreme edge-retention steels available today. The other Chaparral oriented toward hard chore is the extraordinary FRN Serrated Chap.

So… Her Orange Majesty isn’t here to show off. She’s here to cut and cut and cut and cut, and keep cutting, for a very long time between touch-ups. Same as the Serrated Chaparral but in plain edge. Rex121 being known to love toothy edges….

That’s why, despite its compact dimensions, this Orange Chap feels remarkably purpose-built, without sacrificing the slim profile and effortless pocket-ability that make any Chaparral such an outstanding EDC.

The REX 121 blade is the main attraction, naturally. Until now, the Chaparral family has relied primarily on CTS-XHP, with S30V used in the very first production run.

And here is the Tour de Force: as with every Chaparral, we’re looking at an exceptionally thin blade, measuring just 2 mm at the spine. But this time, Spyderco has paired that remarkably slim profile with one of the most wear-resistant steels available in a production knife. It’s an intriguing combination: an ultra-thin blade designed for effortless cutting, backed by a steel renowned for its extraordinary edge retention.

I’ve already spent considerable time testing this steel, particularly on my Spyderco Sage 6 REX 121, which I nicknamed Tango. That knife has been an interesting demonstration of what REX 121 can do in real-world use, including its remarkable ability to retain a working edge over extended periods.

So, if the Sage 6 is Tango, what should we call its smaller relative?

Meet Tanga! Empress Tanga ! 😀

The name seems appropriate for this smaller, more urban-oriented companion. Both knives share the same fundamental attraction: an extremely fine blade combined with a steel designed to retain its edge for an exceptionally long time.

My first cutting tests confirmed that Tanga arrived with an impressively sharp edge. It cuts like a razor, which is exactly what I want to see on a knife made from REX 121. There is little point in choosing a steel with extraordinary edge retention if the knife doesn’t cut properly in the first place. REX 121 can hold a keen edge for a very long time, but that potential needs to be matched by good factory sharpening and an appropriate edge geometry.

So far, so good.

There is, however, one aspect I wanted to investigate immediately: the relationship between the extremely thin blade and the relatively brittle nature of that steel !

At about 70HRC, the über hard REX 121 excels at wear resistance, but it is not a steel I would choose for applications involving substantial lateral stress or twisting. Its impressive edge retention does not make it immune to chipping or other damage when subjected to inappropriate forces. With a blade only 2 mm thick, this was worth checking before putting the knife into regular use.

For now, I wouldn’t feel comfortable using Tanga to carve wood by twisting the blade to remove shavings. I simply don’t have that level of confidence in its resistance to lateral stress, especially given the combination of a 2 mm blade and REX 121 steel. Its extraordinary edge retention is one thing; its resistance to lateral forces is another. Until I’ve gained more experience with this particular knife, I’ll stick to cutting tasks that don’t put the blade under unnecessary lateral stress.

I’ll feel much more comfortable using Tanga for long cuts through corrugated cardboard, for example. The exceptionally thin blade should slice through it with very little resistance, making it ideal for breaking down cardboard boxes into smaller pieces before recycling them. This is exactly the kind of task where the combination of an ultra-thin blade and REX 121’s outstanding edge retention should really shine.

For an initial, informal test, I used the knife to cut through the bottom of a Coca-Cola plastic bottle. The purpose was to assess the factory edge geometry, straight out of the box, independently of the steel itself. Regardless of whether a blade is made from REX 121 or any other steel, its immediate cutting performance depends heavily on the geometry of the edge. We already know that the blade is exceptionally thin, but what about the edge angle? That’s what I wanted to find out.

This is not a comprehensive toughness test, nor does it establish how the knife would perform under more demanding conditions. It was simply a practical way to get an initial feel for the blade’s behavior in hard materials.

I used a pure push cut, driving the blade straight through the plastic without any sawing motion. This is a demanding test of edge geometry, as the blade has to penetrate the material through direct pressure alone.

You have to keep in mind that this is a surprisingly tricky cutting task. The base of a plastic bottle tends to collapse under pressure, and while the blade may initially cut through the material, getting through the thicker central section can be considerably more difficult.

That’s exactly where Tanga got stuck. The blade made its way through the plastic but stalled at the thickest part in the centre. I decided not to push any further. This knife had only just come out of the box, and I would have been rather annoyed with myself if I’d damaged the edge during such an early test.

Interestingly, its little sister, the Chaparral Slipjoint, managed to get through the same obstacle. Another thin-bladed knife I’ve recently tested, the Jess Horn, also performed better in this test. This suggests that there may be a difference in edge geometry between those knives, with Tanga possibly sporting a more obtuse factory edge. Perhaps Spyderco opted for this geometry as a precaution against edge chipping, given the characteristics of REX 121 ? I don’t know.

However, my experience with REX121 suggests that it can handle a much thinner edge and a finer edge angle. When I refined the edge on my Sage 6 REX 121, following the same general approach Sal Glesser had taken with his own Sage 6, I found that the steel could perform very well with a more acute geometry. No chipping at all !

This first test has raised an interesting question: has Spyderco prioritized edge durability over cutting performance with its factory sharpening, or is there simply more to this particular geometry than meets the eye? That is not necessarily a disadvantage. A slightly more robust edge geometry can be a sensible choice for a steel like REX 121, particularly on such a thin blade.

I may eventually give Tanga a little attention with diamond abrasives to refine the geometry and introduce some convexity. For now, however, I’m going to leave the factory edge untouched and see how it performs in everyday use. There is no reason for me to modify an edge before giving it a fair chance.

One of the more interesting things I’ve learned while testing the Sage 6 Tango in Italy is that REX 121 can perform surprisingly well in an everyday food-cutting role, including cutting on ceramic plates. That is not a claim that ceramic contact has no effect whatsoever on an edge. Repeated contact with a hard ceramic surface can eventually affect any knife’s sharpness. But my experience with the Sage 6 has been encouraging, with no obvious premature loss of cutting performance from this type of use and no chipping !

I intend to put Tanga through the same kind of testing.

After all, a small urban folder is likely to encounter food preparation and ordinary daily cutting tasks far more often than any particularly demanding outdoor application.

If it can reproduce Tango’s performance in this respect, that will be another argument in favour of this little knife.

As you can see on the picture: I have deshouldered the SlipIt Chap.

The Chaparral has always made sense as a compact everyday-carry knife. Its size makes it particularly convenient when walking around town, where a larger folder can feel unnecessarily cumbersome.

That is where I intend to concentrate my testing of Tanga.

Tango, my Sage 6 REX 121, has already demonstrated that this steel can be useful well beyond purely urban environments. I see no reason why Tanga should be incapable of handling occasional outdoor tasks, provided her limitations are respected.

But her natural territory is more mundane… more urban: slipping into a pocket, handling everyday cutting jobs, and providing excellent cutting performance without taking up much space in the 5th pocket.

Over the coming weeks, I’ll be using it in precisely that way, paying attention to edge retention, cutting performance, handling, and how well the knife stands up to the routine demands of everyday life.

The real test is not how impressive a knife feels on the first day. It is how well it continues to perform after weeks of use.

There is another detail worth mentioning: the Chaparral’s construction. Spyderco’s hidden pin construction helps prevent vertical blade play, contributing to the sense of rigidity that makes this design feel more substantial than its size would suggest.

There is just one small detail I may address before carrying Tanga regularly: G10 provides excellent grip, but its slightly abrasive texture can sometimes wear against pocket fabric over time. I may gently smooth the area around the clip with fine sandpaper to reduce that risk. This is a minor precaution rather than a criticism of the knife itself.

Otherwise, Tanga is ready to go.

My first encounter with the Spyderco Chaparral REX 121 has been extremely positive. The action is superb, the fit and finish are excellent, the blade is razor sharp, and the knife feels unexpectedly solid for something so compact and thin. The factory edge geometry may deserve some attention in the future, but I’m in no hurry to change it. First, I want to see how it performs as delivered.

So let’s see whether the empress can live up to her family name.

To be continued.

Spyderco Sage 6 Rex 121 — Fourteen Days in Italy, One Knife, No Sharpening

Fourteen days in Italy. One very special knife. No sharpening.
Spoiler alert: actually, no need for it. 😉

And this isn’t the first time I’ve gone to Tuscany with only one Spyderco.

The first time, it was the Tuff by Ed Schempp. Last year, it was the Serrated Chaparral, which turned out to be Walter‘s favourite knife after 6 years of using the Michael Walker in ZDP189.

That was the new experiment. The new road sheet. The new main bearing.

Is Rex 121 too fragile to withstand normal EDC in the countryside?

At twice the price of other super tool steel folders, I wanted to know.
Especially after seeing broken Rex 121 blades on Reddit…
“I was just cutting cardboard…” Tu parles !

When I left for Italy, the only knife I took with me was Tango, my Spyderco Sage 6 in Rex 121.
And for me Rex 121 is the Jack Reacher of tool steels !

And I can tell you, I had spent quite a bit of time getting its edge exactly where I wanted it before the trip.

The idea was simple: use it. Really use it. For two full weeks. For everything. And, whatever happened, never touch the edge again.

No sharpening stone in my bag. No guided touch-up. No diamond stones. Not even a piece of brown cardboard to strop the edge.
Even if the idea crossed my mind more than once during the trip…
Just the freshly sharpened knife, whatever I happened to ask it to do, and fourteen days of real-world use.

And I deliberately didn’t make things easy for it. The Sage 6 in Rex121 is a Lamborghini. But a Lambo isn’t built for rough mountain roads.
So the question was simple: could this one handle them?

Getting the edge right (for me).

Yes. Right for me. Testing with my thumb’s nail. As seen on my previous review, anyone who has been confronted with Rex 121 knows that sharpening this very specific steel is not exactly a relaxing Sunday afternoon activity. Even with diamonds and a good dose of elbow grease.

That alien of a steel is extremely hard and extremely wear-resistant.

So getting a new geometry — as thin as I wanted it on the Sage 6 — took time, patience, and quite a bit of work. Going back to the blade again and again, almost a week of daily touch-ups, trying again and again, and — above all — trying to avoid creating a recurve, which I almost managed to create by flattening the belly.

Damned!!

Sal Glesser, for example, have taken the edge down to around 10 degrees per side on his Sage 6 Rex121.
With all my courage, I decided to go with 15 degrees per side.

That was the geometry I wanted for this particular experiment: still extremely aggressive, but with a little more margin for the kind of abuse a travelling knife can encounter.

And I didn’t polish the edge. On purpose. Following Sal’s own recipe.

Microteeth are our friends.

And believe me, I love polished edges. I’m not usually a fan of rough edges.

But this time, after the diamonds, Tango was different: toothy, aggressive, and sharp as my mother-in-law’s tongue.

I wanted to take advantage of the way Rex 121 behaves with a fine but slightly rough, aggressive apex. Instead of chasing a mirror-polished edge, I left it with the kind of toothy finish that can give a high-performance cutting steel a very particular character — and, hopefully, very high performance.

Scary performance.

And finally, I had exactly what I wanted.

Beware of what you wish for, as they say.

A rough-edged razor. Ready to cut your skin like the caress of a great white shark.

The geometry was still right for comfortable whittling. The Sage 6 has a blade shape that works particularly well for wood carving, especially when I use my left thumb to push the blade through the wood.

The angle was, I hoped, right and regular. I had used the Sharpmaker at 15 degrees per side, with the diamond triangle rods.

But yes, that edge was not pretty but it was an extremely rough, aggressive kind of vibroblade.

And, most importantly, it would shave the hair from my forearm
, legs and hands.
Right.
Time to go to Italy. In Tuscany. In La Noce du Francesca in Caiano.

Fourteen Days of Everything — And Everything Goes

And I know Tango.

It cut food.
It cut cardboard.
It cut packaging.
It cut meat.
It cut hard plastic.
It cut bread with crust as strong as oak wood.
It cut a lot of wood.

And it spent quite a bit of time doing what I particularly enjoy with a knife: whittling. It goes through dry wood like the famous lightsaber in butter.

There is something very revealing about using a knife on wood. You immediately feel what the edge is doing. A good edge doesn’t simply cut — it bites, tracks and gives you control over the material. You feel the cut under your thumb and see how the wood fibers look.

The Rex 121 was excellent at it. Just as impressive on meat, cutting almost like a serrated edge. That vanadium-tungsten-and-cobalt supercharged matrix means business.

But there was another element to the experiment that was perhaps even more interesting.

Other people used the knife.

Non-knife people. Clumsy people. Butchers. Cooks. Teenagers.

Anyone who has travelled with a good knife knows exactly what this means.
You hand it to somebody at the table and, before you have time to say anything, they are cutting something on a ceramic plate.

And ceramic is about as far from knife-friendly as you can get.

There were moments when I watched my beautiful Rex 121 edge being dragged across plates and thought: Well, that’s another few microns gone.

I was wrong.

The plate suffered. Not the knife. Hé hé ! 🙂

Anyway, I wasn’t going to sharpen it.

Whatever happened, happened.

A little bit of tomato juice. A little bit of vinegar.
(Like the song Mambo N°5, this would be Tango N°5 !!)
A little bit of bones in my life
A little bit of frozen food by my side
A little bit of hard cheese‘s all I need (cut on the plate)
A little bit of crusty bread‘s what I see (short blade for big piece of bread !)
A little bit of citrus in the sun, and it dries on the blade.
A little bit of fennel all day long
A little bit of pits, here I am
A little bit of ceramic makes me a man

I also decided to treat the Sage 6 slightly like I would treat a Manix 2 Salt !

Not because Rex 121 is suddenly a stainless steel miracle — it isn’t — but because I wanted to see how it behaved when I simply stopped worrying about it.

Sometimes vinegar.

Sometimes there was tomato juice on the blade.

Sometimes I didn’t clean it immediately.

Sometimes olive oil or the grease from the meat were coating the blade anyway…

I would occasionally rinse my Tango under running water, mainly because I still wanted a clean knife that I could use for food.

But I wasn’t obsessively wiping the blade down after every use.

The knife was travelling.

It was being used. And yet, it wasn’t developing any real patina.

That surprised me.

Natural (Medium)

Even when it was being left alone.

But that was the point.

Natural (Medium)

And then I came home…

After fourteen days, I finally had the opportunity to really examine what had happened to the edge.

And this is where the story became interesting.
I had expected the knife to be tired.
I had expected some degradation.
I had certainly expected that the edge would no longer shave.
It was not.

But I gave it a little time on my barber’s leather strop.

That’s it.
No cardboard.
No stones.
No jade.
No ceramic.
No diamond.

Just a few passes on that very old charged leather.

Then I tried it on the hair of my forearm.

It shaved again.

Not just technically.

It was still an extremely aggressive, extremely fine cutting edge.

And that was the moment when the whole experiment made sense.

The advantage of not polishing Rex 121

I think the finish of the edge was an important part of the result.
Those micro-teeth are harder to kill on hard surfaces like ceramic plates.

And the leather strop was enough to bring it back to life.

That’s what impressed me most.

The knife didn’t need to be resharpened.

It simply needed to be refreshed.

There is a significant difference between the two.

Rex 121 in the real world

This little experiment also changed the way I look at Rex 121.

On paper, Rex 121 can seem almost absurd.

Extreme hardness.
Extreme wear resistance.
A reputation for being difficult to sharpen.

And yes, sharpening it is hard work.

But once you have put the geometry where you want it, the steel starts to make a lot more sense.

The Sage 6 carried an extremely acute, highly aggressive edge into a fourteen-day trip, and I simply used it.

I didn’t baby it.

I didn’t carry a second knife as a backup (but Sardin, which is always with me)

I didn’t sharpen it halfway through the trip.

I didn’t even particularly protect it from the kind of everyday situations that would make most knife enthusiasts wince.

And when I came home, the edge was still there.

Not perfect.

Not untouched.

But there.

A few passes on leather, and the Sage 6 was back to shaving.

Fourteen days. One knife.

That was ultimately the most satisfying part of the experiment.

The Sage 6 wasn’t sitting in a display case.

It was doing exactly what a pocket knife is supposed to do.

It prepared food.

It opened things.

It cut cardboard.

When I finally put it back on the leather, the Rex 121 reminded me why this steel has such a reputation.

That edge can be remarkably persistent.

Tango came back from Italy not looking like a laboratory specimen, but like a knife that had actually lived and been used.

It proved to be a remarkably reliable piece of equipment. No rust. No stains. And an edge that simply laughed at whatever material I threw at it.
The kind of knife that makes all your other knives redundant.
And that’s painful when you think about all the others that are now going to collect dust…

So yes, a Rex 121 blade on a Sage 6 — or a Sage 5 — makes for a fantastic EDC.

It can cut, and cut, and cut, and keep that working edge — no longer razor-sharp, but still seriously sharp — on and on and on.

And this is a fantastic experience.

No rust. No chipping. No stains. I’m amazed!

This is a beast of an EDC!

Thanks to the Spyderco Ambassador Program (*), I didn’t have to pay for this wonderful folder. But perhaps that was the best respect I could pay it: I actually used it.

Real luxury is quality. And in the knife world, quality is meant to be used.

(*) Disclosure: Tango is that Sage 6 REX 121 provided by Spyderco as a complimentary review sample through the Spyderco Ambassador Program. Receiving this amazing knife does not influence my opinions. Spyderco does not preview, edit, or approve my reviews, and all conclusions are based solely on my own testing and experience.

Spyderco Sage 6 REX 121 –C123GPBOR – One week of Tango (part 2)

Disclosure: This is the same Sage 6 REX 121 as my last review, only one week later, provided by Spyderco as a complimentary review sample through the Spyderco Ambassador Program. Receiving this amazing knife does not influence my opinions. Spyderco does not preview, edit, or approve my reviews, and all conclusions are based solely on my own testing and experience.

I call this Sage 6 “Tango”.

Why Tango? Because orange is the color that immediately comes to mind when I look at it — and because the name evokes the Argentine tango dancers of the early 20th century, with their flamboyant, warm-colored clothing.

So, for the rest of this review, Tango it is.

And this particular knife is about to take us somewhere rather unusual: into the world of REX 121, one of the most extreme cutting steels I have ever had the pleasure — and sometimes the frustration — of using.

The Sage 6 Rex121 is not without its flaws. Like every Sage I’ve used, the quillon at the choil is just a little too sharp for my index finger.

The idea was simple: just knock the edge down a bit with a diamond file.
Well, it’s moments like this that make you realize just what a fucking bastard of a steel REX 121 is to file!! Pardon my French.

And on that note, I still haven’t achieved the convex edge I ultimately want.
One thing is certain: REX 121, with its huge percentage of tungsten and cobalt, responds politely only to diamond.

As I’m rather clumsy, I use gaffer tape to protect my blade’sides from scratches I might otherwise cause. Diamonds are unforgiving.
And remember I don’t really sharpen; I reshape that edge, rounding off the angle and turning the original bevel into something more convex and organic — and, above all, much easier to maintain freehand.

The result is immediately apparent in my test, where I push-cut through the bottom of a Coca-Cola plastic bottle. The plastic is thickest right in the center of the bottle’s base, where it corresponds to the injection gate used to form the bottle.

Straight out of the box, Tango couldn’t cut through it.
Once I had convexed the edge, however, the blade went through it with ease.
(But when it comes to this particular test, the Nilakka by Pekka Tuominen wins every single time as also Opinel’s thin blades…)

Naturally, I’ve cut a lot of cardboard with it.

That’s probably the one area where REX 121 absolutely makes a mockery of every other steel on the market, treating them all like a bunch of under-carbonized losers.

I used a Triangle Sharpener with CBN rods, setting the edge at 15° per side.

Once I had established a good edge, I went straight to the leather strop.

The result is a rough shaver, but a shaver nonetheless. It has plenty of bite.

Now, this big show-off of Tango has also been put to work on much more mundane tasks.

Now you’re going to tell me that a 440A knife would handle sausage meat or bread perfectly well, and I’ll tell you that you’re absolutely right.

But this blog isn’t called Nemo Steel Review, is it?

And so that very Sage 6 gets exposed to grease and crumbs.

Those two organic contaminants, once they make their way into the mechanism, can become a problem…

And things could get even worse when you’re skinning a hare…

I don’t have those kinds of thoughts when I use my Manix MagnaMax, fitted with the handle from my Manix 2 Salt, because I know I can soak the knife in hot, soapy water without worrying about corrosion.

But with a Sage 6 carrying a steel this extreme?

Is it going to start rusting somewhere I can’t see?

And will those uncoated skeletonized liners eventually turn into little pockets of rust? Or bacteria colonies ?…

My first thought was to apply a thin layer of Teflon-based bicycle chain oil inside the handle, using a cotton swab soaked in it.

Then I thought: am I really going to have to do this every single time I use it ?

Why the hell am I putting myself through this when I have…

Its little brother, the Sage 5 Salt Lightweight with its CPM MagnaCut blade.
A pure masterpiece of an EDC knife, with every metal component built to withstand a dip in the ocean. Its review is here BTW.

The kind of knife you can throw into the bottom of your suitcase before taking off for some unknown destination. It’ll survive a stint in the rainforest or a picnic beside a salt lake without batting its spyderhole of an eye.

The Sage 6 REX 121 and the Sage 5 Salt MagnaCut represent two almost opposite philosophies of EDC knife.

The REX 121 is a cutting machine: its extreme wear resistance gives it phenomenal edge retention, especially when cutting cardboard.

The trade-off is an exceptionally demanding steel to sharpen, with far less tolerance for moisture and corrosion.

The Sage 5 Salt takes a completely different approach: MagnaCut offers an outstanding balance of edge retention, toughness, and exceptional corrosion resistance.
And the Salt takes that philosophy all the way.

The Sage 6 is the one I’d choose when I want to push cutting performance to the limit, while the Sage 5 is the one I’d take anywhere without having to worry about maintenance.

One makes you think about its steel; the other simply lets you use your knife.

And that, ultimately, is the difference between an extraordinary specialist blade and a true adventure EDC.

I also managed to get a really nice convex edge on my Sage 5, and at this point it needs nothing more than a strop to keep it sharp. It’s a whittling champion, whereas the Sage 6 still needs some work to refine its edge.

MagnaCut is also remarkably tough, while REX 121 is considerably less so. That difference in toughness is something you can feel in actual use: MagnaCut will be much more forgiving when the blade encounters twisting, knots, or lateral stress.

In short, comparing these two brothers is genuinely fascinating.

And I have to admit, choosing REX 121 could almost be considered a form of masochism: it’s more demanding to maintain, both when it comes to mechanism and edge.

But there’s something intoxicating about using REX 121. Putting a steel of this caliber into such an “approachable” friendly platform as the Sage 6 is an experience you really have to live through.

It’s like having a lion in your pocket, ready to roar — to borrow Prince’s words from 1999.

So, ten days later, where does that leave the Sage 6 REX 121?Somewhere between a brilliant EDC knife and a beautifully unnecessary piece of madness.

The REX 121 is an extraordinary steel, but it comes with a price: sharpening is a pain in the arsenal (!!), corrosion resistance requires attention, the edge is less forgiving, and even the mechanism makes you think twice about what you’re putting this knife through.
(The Sage 5 Salt MagnaCut is, in many ways, the rational choice. It is tougher, vastly more corrosion resistant, easier to maintain, and an outstanding whittling knife.)

And yet, if you ask me which one I find more exciting to use, the answer is the Sage 6.

There is something deeply satisfying about having a steel this extreme on such an elegant, compact and friendly platform. It makes very little practical sense — and that is precisely what makes it so much fun.

The Sage 6 REX 121 is not the knife I would recommend to someone looking for the easiest EDC life. It is the knife I would recommend to someone who wants to experience what happens when you put one of the most extreme cutting steels available into one of Spyderco’s most refined platforms.

And if this review occasionally wandered a little too far down the rabbit hole, well…

“I was dreamin’ when I wrote this. Forgive me if it goes astray...”

After all, this is a knife made from REX 121. A little madness was probably unavoidable.