The stem is quite big and probably is be quite strong.
Map of Whistler bike park on the sides.
- 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.
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.
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.