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RenthalApex Stem


Item # REN0025

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  • Black/Gold, 40mm ($120.95)
  • Black/Gold, 50mm ($120.95)
  • Black/Gold, 31mm ($120.95)
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Item # REN0025

Apex Stem

We'd like to say that the Renthal Apex Stem is the perfect match for your excellent new Renthal handlebar — and it is — but really, that statement is too small, because the Renthal Apex Stem is perfect for any handlebar. It's a fantastic piece of engineering and manufacturing from the geniuses over at Renthal's UK-based factory and headquarters, and it would be a great addition to any mountain bike out there.

The Apex stem begins life as a block of 2014-series aluminum, before it's CNC-machined down into the shape you see here. The remaining structure is optimized for absolute stiffness and durability — and with an extensive background in motocross, Renthal knows a thing or two about mitigating the torsional and impact forces imparted by wide handlebars. Still, weight is kept way down, making it an appropriate piece for cross-country machines, not just all-mountain heavy hitters. Those dual clamps up front that constitute the "faceplate" are fashioned from 7075-series aluminum, and their unique shape encompasses 240 degrees of the handlebar, more than virtually all other faceplated stem designs, affording an extremely secure, stiff, and stable platform while minimizing safety-compromising pressure points on the bar.

The Renthal Apex Stem comes in one finish —Black/gold, and in 10mm length increments, from 40mm to 90mm.

  • CNC machined from solid 2014-series aluminum
  • 7075 aluminum clamping hardware
  • Snazzy Art Deco styling

Tech Specs
Material2014-series aluminum
Length40 - 90mm
Clamp Diameter31.8mm
Steer Tube Diameter1.125in
Bar Attachmenttwo-piece, four-bolt face plate

Actual Weight

Black/Gold, 40mm
Black/Gold, 50mm
Black/Gold, 31mm

Claimed Weight

Claimed weights are provided by the vendor.

Have questions? Chat with a Gearhead

[60mm] 4.8oz

Actual weights are measured in-house by the Competitive Cyclist team.

Have questions? Chat with a Gearhead

What do you think about this product?



What size bar is this Renthal apex for? It doesn’t have any bar size. For a 35mm or 31.8?

Hey Cesar, looks like we have the measurements in inches opposed to MM but this stem is for a 31.8mm bar. This is not the oversized 35mm stem option. If that is what you are looking for check out item #REN0029. Thank you for your question!

>Rating: 5

No more creaking with my carbon bars

I've put it through the wringer
True to size
Size Bought

Had a problem with my Raceface Turbine stem creaking with my carbon bars; had applied carbon fiber assembly gel but still they creaked. This stem solved that and with less torque on the bars. Great product!

>Rating: 5

Great Stem

I've put it through the wringer

I like the simplicity of the design, the clean profile, and the light weight. Can't go wrong with one of these! Have been using it for the last 6 months and am perfectly happy with it.

>Rating: 5

31.8 stem doesn't say it anywhere I see?

Assumed this was a 35mm. my mistake. But I don't see it called out anywhere in the spec's

Looks like it is 31.8 from the website:


Is this product intended for 31.8mm handlebars or 35mm?

Looks like it is 31.8 from the website:

>Rating: 5

Well Made Stem

I've put it through the wringer

Really nicely made. Looks can be polarizing with its gold-ish faceplate (which btw doesnt really match with anything outright), but its easy to see the quality of the product in the way that it is machined. The tolerances are impressively tight.... to install the bar i actually had to insert the bar by its narrower tapered section and slide it over. The faceplate is also secured by a slightly different system where you tighten the bottom two bolts all the way down then only have to worry about the right torque for the top two bolts.

>Rating: 5

Beautiful Piece of Metal

I've matched this up with Renthal's FatBar. It looks great and works as designed. Very nice craftsmanship@