Race Face Atlas 35 Ø 50 mm Stem Long-Term Review

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The stem is quite big and probably is be quite strong.

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Map of Whistler bike park on the sides.

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Cons:

  • I had issues with the bolts loosening, and the Loctite 243 disappearing, I’m not sure why, but maybe I am pushing the stem to extremes with the temperature changes, and the Loctite gets worn off, most of the traces were gone. I had to check before, during and after the ride to make sure it was secure, other wise I would risk the bars spinning, which happen several times, and when getting the bike out from room stem home to outdoors in -10C this was not the case with Renthal apex 35 stem as long as I used Loctite 243, the only times I made it loosen was without Loctite or not cured with big temperature change, I have tested this on the Apex stem I Intentionally Did not put Loctite 243 with the Apex them the stem spun on the steerer, at a day with rapid temp change, it got to 25C, but it did not other places where it had Loctite on. I also experienced this in the winter when I just installed it and Loctite did not cure. But with The Atlas Stem it would happen even with Loctite cured, It did not handle this well even with Loctite 243.

I can’t know if it’s a combination of the materials used in bolts,stem, or and the clamp design, but the difference was huge.

The Atlas Stem is made of 6061-T6 aluminum.

I haven’t tried changing the bolts yet, So I haven’t tried Titanium bolts, I don’t know how much it will effect the issues I experienced. I know many are satisfied with this stem, But they might not be using it to the extremes I am, with the temp changes.

  • The bolts don’t have good tolerances in the head, so there will be some play between the hex key, I had the same experience with all other Race Face Bolts, on Turbine Dropper, Atlas Cranks.
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Race Face Atlas zero rise Ø35 50mm_1117_DxO

Not for ”weight wienies”, 9 grams heavier than the Renthal Apex, it’s quite a noticeable difference, when I hold them, but not a a huge difference, but it all adds up.

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If any one has tested this stem with aftermarket bolts, Titanium bolts, or have any knownlage to share about it, feel free to comment on this.

I have of course not tested it in a lab, or special tools so can’t have precise findings.

https://www.raceface.com/products/details/atlas-35-stems

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