Fox 40 Fork
What the checker says680will not fit23check before you buy429worth 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. 4773 produced no finding of any kind; that is 40 Float Performance Grip 203 (29). 40 Factory MY27 203 (27.5) (2027) clears 4088. Each variant produces 292 to 499 distinct errors and 11 to 17 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 3 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 3 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 3 variants.
- Will not fiterror · FrameSteerer mismatch: Fork is Straight 1.125 (dual-crown) but Frame headset is Tapered (1.5-1.125). On 233 of the 258 verified frames in this catalog. Applies to all 3 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 2 of 3 variants.
- Will not fiterror · Front WheelFront axle mismatch: Fork is 20x110 Boost (DH) but Front wheel hub is Boost 15x110. On 220 of the 270 verified front wheels in this catalog. Applies to all 3 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 3 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 2 of 3 variants.
Wheel config, Frame. 239 more findings from the same check, on up to 2 of the 258 verified frames each.
Headset steerer, Headset. 198 more findings from the same check, on up to 1 of the 70 verified headsets each.
Fork travel, Frame. 176 more findings from the same check, on up to 2 of the 258 verified frames each.
Front brake mount, Front Brake. 18 more findings from the same check, on up to 1 of the 92 verified brakes each.
Front rotor min, Front Rotor. 6 more findings from the same check, on up to 47 of the 177 verified rotors each.
Front axle, Front Wheel. 4 more findings from the same check, on up to 10 of the 270 verified front wheels 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 axle, Front Hub. 3 more findings from the same check, on up to 2 of the 40 verified front hubs 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 TireFront tire clearance: 2.6in tire is wider than Fox 40 Factory MY27 203 (27.5)'s 2.5in chassis max. On 108 of the 617 verified tires in this catalog. Applies to 1 of 3 variants.
- Check before you buywarning · Front TireFront tire clearance: 2.6in tire is wider than Fox 40 Factory MY27 203 (29)'s 2.5in chassis max. On 108 of the 617 verified tires in this catalog. Applies to 1 of 3 variants.
- Check before you buywarning · Front TireFront tire clearance: 2.8in tire is wider than Fox 40 Factory MY27 203 (27.5)'s 2.5in chassis max. On 15 of the 617 verified tires in this catalog. Applies to 1 of 3 variants.
- Check before you buywarning · Front TireFront tire clearance: 2.8in tire is wider than Fox 40 Factory MY27 203 (29)'s 2.5in chassis max. On 15 of the 617 verified tires in this catalog. Applies to 1 of 3 variants.
- Check before you buywarning · FrameFork travel: 203mm exceeds the frame's rated max of 150mm. On 12 of the 258 verified frames in this catalog. Applies to all 3 variants.
- Check before you buywarning · FrameFork travel: 203mm exceeds the frame's rated max of 170mm. On 12 of the 258 verified frames in this catalog. Applies to all 3 variants.
- Check before you buywarning · FrameFork travel: 203mm exceeds the frame's rated max of 160mm. On 10 of the 258 verified frames in this catalog. Applies to all 3 variants.
- Check before you buywarning · FrameFork travel: 203mm exceeds the frame's rated max of 140mm. On 9 of the 258 verified frames in this catalog. Applies to all 3 variants.
Front tire fork, Front Tire. 8 more findings from the same check, on up to 5 of the 617 verified tires each.
Fork travel, Frame. 6 more findings from the same check, on up to 7 of the 258 verified frames each.
Steerer, Frame. 1 more finding from the same check, on up to 8 of the 258 verified frames 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 3 variants.
Headset advisory, Frame. 428 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.
$1,300.00 to $1,999.00 MSRP·2745 g
What the maker states
- Travel
- 203 mm of travel (maker-stated)
- Wheel
- Built for a 29" wheel (on 2 of 3 variants); Built for a 27.5" wheel (on 1 of 3 variants)
- Axle
- Front axle 20x110 Boost (DH)
- Steerer
- Straight 1.125 (dual-crown)
- Minimum front rotor
- Front rotor no smaller than 200 mm (on 2 of 3 variants)
- Maximum front rotor
- Front rotor up to 230 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.
3 verified variants
| Variant | Wheel | Minimum front rotor | Maximum tire | Price (MSRP) | Weight | Source | Last checked | Build |
|---|---|---|---|---|---|---|---|---|
| 40 Factory MY27 203 (29) (2027) | Built for a 29" wheel | Front rotor no smaller than 200 mm | Tire up to 2.5" (maker-stated maximum) | $1,999.00 | 2745 g | maker’s page | 2026-07-13 | Build with this |
| 40 Factory MY27 203 (27.5) (2027) | Built for a 27.5" wheel | Front rotor no smaller than 200 mm | Tire up to 2.5" (maker-stated maximum) | $1,999.00 | 2745 g | maker’s page | 2026-07-13 | Build with this |
| 40 Float Performance Grip 203 (29) | Built for a 29" wheel | not stated | not stated | $1,300.00 | not stated | maker’s page | 2026-08-03 | Build with this |
The rest of what the maker states2 stated·2 not published
- Brake mount Post mount.
- Tire up to 2.5" (maker-stated maximum) (on 2 of 3 variants).
2 further fields the checker looks for are not published by Fox, so we leave them blank rather than estimate them, and those 2 checks stay silent on this fork. They are maximum tire mm and maximum tire basis. 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 2026-07-13 to 2026-08-03.
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) Will not fit
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.