Darimo Carbon is no longer limited to carbon thanks to the long-awaited release of their lightweight CNC-machined IX2AL aluminum stem. It’s been a long time coming, as we’d seen prototypes of the alloy stem on pro mountain bikers for a couple of seasons. But while Darimo was refining cockpit positions for elite mountain bike racers, back in the workshop they were machining, testing & refining the customizable alloy stem to bring it to consumers, too…

Darimo ultralight custom IX2AL alloy stem

Darimo IX2AL stem, ultralight custom aluminum alloy road mountain bike stem

c. Darimo

We last caught up with one of the fully customizable Darimo IX2AL aluminum stems on Anton Cooper’s super slammed Trek Supercaliber World Cup XC bike. Cooper, together with fellow Trek Factory Racing’s Evie Richards and BiSX Performance Race’s Lukas Fluckiger, have all worked with Darimo, because their stock stems on modern 29er just couldn’t get the bar down low enough for them.

Development & customization

Darimo ix2al aluminum stem, Anton Cooper Trek Supercaliber XC mountain bike, close-up

Trek bike photos by Jordan Villella

Cooper had asked Darimo to make him a -40° stem to race the Olympics. And instead of developing a different mold for each possible size Darimo refined a CNC-machined design made of aluminum that they could make one at a time, at weights surprisingly close to their ultralight carbon. After getting it through full ISO testing, Darimo says a -17° x 100mm stem weighs just 85g.

Darimo IX2AL stem, ultralight custom aluminum alloy road mountain bike stem, 85g actual weight

-17° x 100mm at 85g

So in the end, the IX2AL aluminum stem developed into a solution for pros looking to dial in their fit without sacrificing weight or stiffness AND a user-customizable option for consumers, too. Darimo offers the light alloy stem in 37 standard sizes (with weights ranging from just 52g-99g across the wide range). But they can also make you a fully-custom stem as well – in custom length, angle, clamp size, heavier rider reinforcement, anodized color, and even carve your name into it!

Tech Details

Darimo IX2AL stem, ultralight custom aluminum alloy road mountain bike stem, integrated faceplate

The Darimo ultralight custom IX2AL alloy stem uses a one-piece integrated faceplate design for carbon-safe clamping, secured with two M4 titanium faceplate bolts. The design has a natural hinge built into the 48mm wide 31.8mm clamping area to ease getting a bar in & out. Darimo even says it works well with lightweight road handlebars too like their Ellipse in either road or gravel variants, just no large aero section bars, though.

Darimo IX2AL stem, ultralight custom aluminum alloy road mountain bike stem, gravel ellipse bar

The IX2AL comes standard in -6°, -12°, -17° & -25° angles and lengths in ten-millimeter increments from 40-130mm. They even have a handy dimension spreadsheet link that will help you determine the reach Bar Stack & Reach impacts of stem sizes on your bike. And of course, if you need something outside of that wide range, they can custom make almost any size you can imagine.

Darimo IX2AL alloy stem – Pricing & Availability

Darimo IX2AL stem, ultralight custom aluminum alloy road mountain bike stem, black or silver

Stock sizes of the Darimo IX2AL alloy stem sell for 200€, including your choice of gloss black anodized, matte black ano (a bit more grey-ish), or natural ano silver finishes. Custom length & custom angle stems sell for just 240€.

Darimo IX2AL stem, ultralight custom aluminum alloy road mountain bike stem, in stock

Standard sizes are kept in stock, but Darimo also machines-to-order in Spain, so you can even get your name engraved on a standard-sized stem if you want. Standard ultralight alloy stems are recommended for up to 90kg (198lb) riders, but Darimo also offers reinforced versions for riders of any weight.

Darimo.eu

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8 Comments
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dr_lha
dr_lha
28 days ago

And I thought it was awkward to get the handlebar into a Ritchey C220 stem!

Hexsense
Hexsense
28 days ago

hmm, what is lower.
Darimo 25 degree or FSA 20 degree with 12mm downward offset?
My quick scratch on napkin say FSA 20 degree with 12mm downward offset is lower.

luddite
luddite
28 days ago

First bar-spinning crash is going to write off the frame unless you have a Trek knock-block headset installed.

Chader
Chader
28 days ago
Reply to  luddite

Funny enough, the bike shown IS actually a Trek Supercaliber with Knock Block options. But this seems to have NOT included the necessary hardware and adapter to make it functional with a non-Trek stem. It sure could lead to a costly wreck if the bars get tossed even a little bit.

TimE
TimE
27 days ago
Reply to  luddite

no ones holding a gun to your head forcing you to buy it

An203
28 days ago

What a beauty, its lines are soooo smooth and yes weight is great but the variety of std angles and length is unique, without mentioning the custom options.
Always impressed how a small brand like Darimo can product so many references of unique products (look at their multiple seat post to replace all the proprietary ones while being the lightest in the world).

Chuck borris
Chuck borris
27 days ago
Reply to  An203

Really looks horrible to me. 1mm stepover at least…and the first pic has vibration marks in it. Lazy and poor machining.

Ceuleers
Ceuleers
23 days ago

Hi guys,
I’ve been doing cyclo-cross and mountain bike for… more than 50 years, yes I’m certainly not very young, but I only use ultra-light equipment and Darimo is excellent and has all my confidence, I don’t am more so light, I like good things! and despite the ultra-light weight it holds the constraints very well

Alain from Belgium