Race Face Atlas Stem
What the checker says4will not fit
Run variant by variant through the mountain bike builder’s own engine. Every sentence below is the checker’s, unedited. Nothing here says this part fits your bike; it says what it does and does not fit among the parts we hold.
Checked against 5922 verified mountain bike parts in this catalog. 5799 produced no finding of any kind; that is Atlas 31.8 (50mm). Atlas 35 (50mm) clears 5774. Each variant produces 2 distinct errors and 0 distinct warnings.
Will not fit
- Will not fiterror · HandlebarBar/stem clamp mismatch: a 31.8mm bar does not clamp in a 35mm stem - the clamp diameters differ. A shim or adapter may make other sizes or standards work, but that is a modification, not a fit. On 147 of the 270 verified handlebars in this catalog. Applies to 1 of 2 variants.
- Will not fiterror · HandlebarBar/stem clamp mismatch: Handlebar is 35mm but Stem is 31.8mm - a bigger bar cannot fit a smaller stem clamp. On 122 of the 270 verified handlebars in this catalog. Applies to 1 of 2 variants.
- Will not fiterror · HandlebarBar/stem clamp mismatch: a 25.4mm bar does not clamp in a 31.8mm stem - the clamp diameters differ. A shim or adapter may make other sizes or standards work, but that is a modification, not a fit. On 1 of the 270 verified handlebars in this catalog. Applies to 1 of 2 variants.
- Will not fiterror · HandlebarBar/stem clamp mismatch: a 25.4mm bar does not clamp in a 35mm stem - the clamp diameters differ. A shim or adapter may make other sizes or standards work, but that is a modification, not a fit. On 1 of the 270 verified handlebars in this catalog. Applies to 1 of 2 variants.
$109.99 to $121.99 MSRP·160 g
What the maker states
- Clamp
- Bar clamp 31.8 mm (on 1 of 2 variants); Bar clamp 35 mm (on 1 of 2 variants)
- Length
- 50 mm
A value shown as a set or a range differs between this model’s variants and is never one variant’s spec.
2 verified variants
| Variant | Clamp | Price (MSRP) | Weight | Source | Last checked | Build |
|---|---|---|---|---|---|---|
| Atlas 35 (50mm) | Bar clamp 35 mm | $121.99 | 160 g | maker’s page | 2026-07-16 | Build with this |
| Atlas 31.8 (50mm) | Bar clamp 31.8 mm | $109.99 | not stated | maker’s page | 2026-08-19 | Build with this |
Source
Source: each variant links the maker’s own page in the table above. Last checked 2026-07-16 to 2026-08-19.
Checked against
The checker ran this model against every verified part below that it has a slot for, the same way it checks a build in the builder. What follows is the verdict it actually produced for that specific pairing — not a recommendation, and not a guarantee any of these parts fits your own bike.
- 5DEV R-SPEC Trail/Enduro Cranks (Crankset) No conflicts found
- 9point8 Fall Line (Dropper Post) No conflicts found
- ACID SLX 30 front (Front Wheel) No conflicts found
- ACID SLX 30 rear (Rear Wheel) No conflicts found
- Acros ZS44/ZS56 (Headset) No conflicts found
- Acros ZS56/ZS56 (Headset) No conflicts found
6 of 1776 counterparts with a page of their own that the checker actually probed this model against, in alphabetical order by brand and model — never by price, popularity or the verdict itself.