Ritchey WCS Carbon BOOST Mountain Fork Fork
What the checker says485will not fit12check before you buy343worth knowing
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 5684 verified mountain bike parts in this catalog. 4903 produced no finding of any kind; that is WCS Carbon BOOST Mountain Fork (29). WCS Carbon BOOST Mountain Fork (27.5) clears 4309. Each variant produces 236 to 440 distinct errors and 8 distinct warnings.
Will not fit
- Will not fiterror · Front TireFront wheel size mismatch: Fork 27.5", Front tire 29". On 370 of the 617 verified tires in this catalog. Applies to 1 of 2 variants.
- Will not fiterror · Rear TireUnsupported wheel setup: front 27.5" / rear 29" matches no configuration (24"/24", 26"/26", 27.5"/27.5", 29"/29", 32"/32", mullet = 29" front / 27.5" rear). On 370 of the 617 verified tires in this catalog. Applies to 1 of 2 variants.
- Will not fiterror · Rear WheelUnsupported wheel setup: front 27.5" / rear 29" matches no configuration (24"/24", 26"/26", 27.5"/27.5", 29"/29", 32"/32", mullet = 29" front / 27.5" rear). On 359 of the 607 verified rear wheels in this catalog. Applies to 1 of 2 variants.
- Will not fiterror · Front TireFront wheel size mismatch: Fork 29", Front tire 27.5". On 223 of the 617 verified tires in this catalog. Applies to 1 of 2 variants.
- Will not fiterror · Front WheelFront wheel size mismatch: Fork 27.5", Front wheel 29". On 175 of the 270 verified front wheels in this catalog. Applies to 1 of 2 variants.
- Will not fiterror · Front WheelFront wheel size mismatch: Fork 29", Front wheel 27.5". On 90 of the 270 verified front wheels in this catalog. Applies to 1 of 2 variants.
- Will not fiterror · Front RimFront wheel size mismatch: Fork 27.5", Front wheel 29". On 38 of the 75 verified rims in this catalog. Applies to 1 of 2 variants.
- Will not fiterror · Rear RimUnsupported wheel setup: front 27.5" / rear 29" matches no configuration (24"/24", 26"/26", 27.5"/27.5", 29"/29", 32"/32", mullet = 29" front / 27.5" rear). On 38 of the 75 verified rims in this catalog. Applies to 1 of 2 variants.
Wheel config, Frame. 239 more findings from the same check, on up to 2 of the 258 verified frames each.
Fork travel min, Frame. 180 more findings from the same check, on up to 2 of the 258 verified frames each.
Front brake mount, Front Brake. 12 more findings from the same check, on up to 1 of the 92 verified brakes each.
Headset steerer, Headset. 8 more findings from the same check, on up to 1 of the 70 verified headsets each.
Front axle, Front Wheel. 5 more findings from the same check, on up to 32 of the 270 verified front wheels each.
Front axle, Front Hub. 4 more findings from the same check, on up to 3 of the 40 verified front hubs each.
Front wheel size, Front Rim. 4 more findings from the same check, on up to 3 of the 75 verified rims each.
Front wheel size, Front Tire. 4 more findings from the same check, on up to 21 of the 617 verified tires each.
Front wheel size, Front Wheel. 4 more findings from the same check, on up to 3 of the 270 verified front wheels each.
Wheel config, Rear Rim. 4 more findings from the same check, on up to 3 of the 75 verified rims each.
Wheel config, Rear Tire. 4 more findings from the same check, on up to 21 of the 617 verified tires each.
Wheel config, Rear Wheel. 4 more findings from the same check, on up to 7 of the 607 verified rear wheels each.
Front rotor min, Front Rotor. 2 more findings from the same check, on up to 18 of the 177 verified rotors each.
Steerer, Frame. 2 more findings from the same check, on up to 17 of the 258 verified frames each.
Open a variant in the builder to see the ones that apply to your own parts.
Check before you buy
- Check before you buywarning · Front RotorFront rotor: 203mm exceeds the fork max of 180mm. A post-mount adapter is the part that steps a caliper up to a bigger rotor, sold in the maker’s own discrete size steps (commonly +20mm, e.g. 160 to 180mm or 180 to 200mm) rather than for any gap - and not every step is offered for every caliper model, so check the maker’s own fitment before buying. On 40 of the 177 verified rotors in this catalog. Applies to all 2 variants.
- Check before you buywarning · Front RotorFront rotor: 220mm exceeds the fork max of 180mm. A post-mount adapter is the part that steps a caliper up to a bigger rotor, sold in the maker’s own discrete size steps (commonly +20mm, e.g. 160 to 180mm or 180 to 200mm) rather than for any gap - and not every step is offered for every caliper model, so check the maker’s own fitment before buying. On 15 of the 177 verified rotors in this catalog. Applies to all 2 variants.
- Check before you buywarning · Front RotorFront rotor: 200mm exceeds the fork max of 180mm. A post-mount adapter is the part that steps a caliper up to a bigger rotor, sold in the maker’s own discrete size steps (commonly +20mm, e.g. 160 to 180mm or 180 to 200mm) rather than for any gap - and not every step is offered for every caliper model, so check the maker’s own fitment before buying. On 11 of the 177 verified rotors in this catalog. Applies to all 2 variants.
- Check before you buywarning · Front RotorFront rotor: 223mm exceeds the fork max of 180mm. A post-mount adapter is the part that steps a caliper up to a bigger rotor, sold in the maker’s own discrete size steps (commonly +20mm, e.g. 160 to 180mm or 180 to 200mm) rather than for any gap - and not every step is offered for every caliper model, so check the maker’s own fitment before buying. On 5 of the 177 verified rotors in this catalog. Applies to all 2 variants.
- Check before you buywarning · Front TireFront tire clearance: 3in tire is wider than Ritchey WCS Carbon BOOST Mountain Fork (27.5)'s 2.9in chassis max. On 5 of the 617 verified tires in this catalog. Applies to 1 of 2 variants.
- Check before you buywarning · Front TireFront tire clearance: 3in tire is wider than Ritchey WCS Carbon BOOST Mountain Fork (29)'s 2.9in chassis max. On 5 of the 617 verified tires in this catalog. Applies to 1 of 2 variants.
Front tire fork, Front Tire. 6 more findings from the same check, on up to 1 of the 617 verified tires each.
Open a variant in the builder to see the ones that apply to your own parts.
Worth knowing
- Worth knowinginfo · FrameHeadset: Antidote Carbonjack takes ZS44 upper / ZS56 lower cups (S.H.I.S.) to mount the fork - many frames ship with one; pick one here if yours does not. On 2 of the 258 verified frames in this catalog. Applies to all 2 variants.
Headset advisory, Frame. 342 more findings from the same check, on up to 1 of the 258 verified frames each.
Open a variant in the builder to see the ones that apply to your own parts.
$769.95 MSRP·767 g
What the maker states
- Travel
- 0 mm of travel (maker-stated)
- Wheel
- Built for a 27.5" wheel (on 1 of 2 variants); Built for a 29" wheel (on 1 of 2 variants)
- Axle
- Front axle Boost 15x110
- Steerer
- Tapered (1.5-1.125)
- Minimum front rotor
- Front rotor no smaller than 160 mm
- Maximum front rotor
- Front rotor up to 180 mm (maker-stated maximum)
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 | Wheel | Price (MSRP) | Weight | Source | Last checked | Build |
|---|---|---|---|---|---|---|
| WCS Carbon BOOST Mountain Fork (27.5) | Built for a 27.5" wheel | $769.95 | 767 g | maker’s page | 2026-08-27 | Build with this |
| WCS Carbon BOOST Mountain Fork (29) | Built for a 29" wheel | $769.95 | 767 g | maker’s page | 2026-08-27 | Build with this |
The rest of what the maker states3 stated·1 not published
- Brake mount Post mount.
- Tire up to 2.9" (maker-stated maximum).
- Maximum tire basis: label.
1 further field the checker looks for is not published by Ritchey, so we leave it blank rather than estimate it, and that check stays silent on this fork. It is maximum tire mm. Each is recorded as “not stated by the maker (not checked)”.
Source: each variant links the maker’s own page in the table above. Last checked 2026-08-27.
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
- 9point8 Stout (31.8, 30mm) (Stem) No conflicts found
- ACID SLX 30 front (Front Wheel) Will not fit
- ACID SLX 30 rear (Rear Wheel) Will not fit
- Acros ZS44/ZS56 (Headset) No conflicts found
6 of 1831 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.