Transition Sentinel Frame
What the checker says477will not fit12check before you buy279worth 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 5916 verified mountain bike parts in this catalog. 3320 produced no finding of any kind. Each variant produces 277 distinct errors and 6 distinct warnings.
Will not fit
- Will not fiterror · Rear ShockShock mount mismatch: Frame uses a Trunnion shock but Shock is Standard eyelet. On 529 of the 1025 verified rear shocks in this catalog. Applies to all 2 variants.
- Will not fiterror · Front TireUnsupported wheel setup: Transition Sentinel Alloy supports 29" / 29"/27.5", but this build is front 27.5" / rear (any). On 223 of the 617 verified tires in this catalog. Applies to 1 of 2 variants.
- Will not fiterror · Front TireUnsupported wheel setup: Transition Sentinel Carbon supports 29" / 29"/27.5", but this build is front 27.5" / rear (any). On 223 of the 617 verified tires in this catalog. Applies to 1 of 2 variants.
- Will not fiterror · ForkUnsupported wheel setup: Transition Sentinel Alloy supports 29" / 29"/27.5", but this build is front 27.5" / rear (any). On 157 of the 490 verified forks in this catalog. Applies to 1 of 2 variants.
- Will not fiterror · ForkUnsupported wheel setup: Transition Sentinel Carbon supports 29" / 29"/27.5", but this build is front 27.5" / rear (any). On 157 of the 490 verified forks in this catalog. Applies to 1 of 2 variants.
- Will not fiterror · Rear WheelRear axle mismatch: Frame is Boost 148x12 but Rear wheel hub is SuperBoost 157x12. On 143 of the 607 verified rear wheels in this catalog. Applies to all 2 variants.
- Will not fiterror · Dropper PostDropper too small: Frame seat tube is 31.6mm but Dropper is 30.9mm. A shim or adapter may make other sizes or standards work, but that is a modification, not a fit. On 119 of the 350 verified dropper posts in this catalog. Applies to all 2 variants.
Headset lower, Headset. 88 more findings from the same check, on up to 1 of the 70 verified headsets each.
Headset upper, Headset. 80 more findings from the same check, on up to 1 of the 70 verified headsets each.
Shock stroke over, Rear Shock. 80 more findings from the same check, on up to 1 of the 1025 verified rear shocks each.
Bb shell, Bottom Bracket. 68 more findings from the same check, on up to 1 of the 63 verified bottom brackets each.
Shock size, Rear Shock. 51 more findings from the same check, on up to 57 of the 1025 verified rear shocks each.
Fork travel min, Fork. 16 more findings from the same check, on up to 68 of the 490 verified forks each.
Gearbox frame, Gearbox. 12 more findings from the same check, on up to 1 of the 6 verified gearboxs each.
Rear brake mount, Rear Brake. 12 more findings from the same check, on up to 1 of the 92 verified brakes each.
Fork travel, Fork. 10 more findings from the same check, on up to 52 of the 490 verified forks each.
Wheel config, Front Rim. 6 more findings from the same check, on up to 33 of the 75 verified rims each.
Wheel config, Front Wheel. 6 more findings from the same check, on up to 90 of the 270 verified front wheels each.
Oem shock, Rear Shock. 5 more findings from the same check, on up to 1 of the 1025 verified rear shocks each.
Rear axle, Rear Hub. 5 more findings from the same check, on up to 5 of the 124 verified rear hubs each.
Wheel config, Front Tire. 4 more findings from the same check, on up to 21 of the 617 verified tires 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.
Rear axle, Rear Wheel. 3 more findings from the same check, on up to 27 of the 607 verified rear wheels each.
Seatpost diameter small, Seatpost (rigid). 3 more findings from the same check, on up to 22 of the 70 verified seatpost (rigid)s each.
Steerer, Fork. 2 more findings from the same check, on up to 55 of the 490 verified forks each.
Wheel config, Fork. 2 more findings from the same check, on up to 12 of the 490 verified forks each.
Dropper diameter, Dropper Post. 1 more finding from the same check, on up to 72 of the 350 verified dropper posts each.
Dropper diameter small, Dropper Post. 1 more finding from the same check, on up to 13 of the 350 verified dropper posts each.
Seatpost diameter, Seatpost (rigid). 1 more finding from the same check, on up to 4 of the 70 verified seatpost (rigid)s each.
Shock stroke short, Rear Shock. 1 more finding from the same check, on up to 26 of the 1025 verified rear shocks 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 · Rear TireRear tire clearance: 2.6in tire is wider than Transition Sentinel Alloy's 2.5in frame max. On 108 of the 617 verified tires in this catalog. Applies to 1 of 2 variants.
- Check before you buywarning · Rear TireRear tire clearance: 2.6in tire is wider than Transition Sentinel Carbon's 2.5in frame max. On 108 of the 617 verified tires in this catalog. Applies to 1 of 2 variants.
- Check before you buywarning · Rear TireRear tire clearance: 2.8in tire is wider than Transition Sentinel Alloy's 2.5in frame max. On 15 of the 617 verified tires in this catalog. Applies to 1 of 2 variants.
- Check before you buywarning · Rear TireRear tire clearance: 2.8in tire is wider than Transition Sentinel Carbon's 2.5in frame max. On 15 of the 617 verified tires in this catalog. Applies to 1 of 2 variants.
- Check before you buywarning · Rear TireRear tire clearance: 3in tire is wider than Transition Sentinel Alloy's 2.5in frame max. On 5 of the 617 verified tires in this catalog. Applies to 1 of 2 variants.
- Check before you buywarning · Rear TireRear tire clearance: 3in tire is wider than Transition Sentinel Carbon's 2.5in frame max. On 5 of the 617 verified tires in this catalog. Applies to 1 of 2 variants.
Rear tire frame, Rear 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 · ForkHeadset: Transition Sentinel Alloy 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 490 of the 490 verified forks in this catalog. Applies to 1 of 2 variants.
- Worth knowinginfo · ForkHeadset: Transition Sentinel Carbon 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 490 of the 490 verified forks in this catalog. Applies to 1 of 2 variants.
- Worth knowinginfo · Dropper PostLong-drop post: the BikeYoke Divine 2.0 (185mm) needs deep seat-tube insertion - check the maker's insertion calculator for your Transition Sentinel Alloy frame size. On 3 of the 350 verified dropper posts in this catalog. Applies to 1 of 2 variants.
- Worth knowinginfo · Dropper PostLong-drop post: the BikeYoke Divine 2.0 (185mm) needs deep seat-tube insertion - check the maker's insertion calculator for your Transition Sentinel Carbon frame size. On 3 of the 350 verified dropper posts in this catalog. Applies to 1 of 2 variants.
- Worth knowinginfo · Dropper PostLong-drop post: the BikeYoke Divine 2.0 (213mm) needs deep seat-tube insertion - check the maker's insertion calculator for your Transition Sentinel Alloy frame size. On 3 of the 350 verified dropper posts in this catalog. Applies to 1 of 2 variants.
- Worth knowinginfo · Dropper PostLong-drop post: the BikeYoke Divine 2.0 (213mm) needs deep seat-tube insertion - check the maker's insertion calculator for your Transition Sentinel Carbon frame size. On 3 of the 350 verified dropper posts in this catalog. Applies to 1 of 2 variants.
- Worth knowinginfo · CranksetBottom bracket: Shimano CUES FC-U6000-1 uses a 24 mm spindle spindle - pair it with the right BB for this frame's BSA threaded 73 shell (BB usually sold separately). On 2 of the 98 verified cranksets in this catalog. Applies to all 2 variants.
Dropper insertion, Dropper Post. 176 more findings from the same check, on up to 1 of the 350 verified dropper posts each.
Bb advisory, Crankset. 96 more findings from the same check, on up to 1 of the 98 verified cranksets each.
Open a variant in the builder to see the ones that apply to your own parts.
$2,399.00 to $3,799.00 MSRP·3100 to 3700 g
What the maker states
- Wheel configs
- Frame takes 29" and 29"/27.5" wheels
- Travel
- Frame travel 150 mm (maker-stated)
- Shock eye
- Shock eye-to-eye 205 mm
- Shock stroke
- 60 mm
- Shock mount
- Trunnion
- Maximum fork travel
- Approved for a fork up to 160 mm of travel
2 verified variants
| Variant | Frame only | Material | Price (MSRP) | Weight | Source | Last checked | Build |
|---|---|---|---|---|---|---|---|
| Sentinel Carbon (2025) | Sold as a frame only | Carbon construction | $3,799.00 | 3100 g | maker’s page | 2026-08-19 | Build with this |
| Sentinel Alloy (2025) | Sold as a frameset, not a bare frame | Aluminum construction | $2,399.00 | 3700 g | maker’s page | 2026-08-19 | Build with this |
The rest of what the maker states16 stated·20 not published
- Maker-stated design fork travel 160 mm.
- Rear axle Boost 148x12.
- Bottom-bracket shell BSA threaded 73.
- Upper head-tube bore ZS44/28.6 (S.H.I.S.).
- Lower head-tube bore ZS56/40 (S.H.I.S.).
- Seatpost diameter 31.6 mm.
- Rear rotor up to 223 mm (maker-stated maximum).
- Tire up to 2.5" (maker-stated maximum).
- The maker approves a coil shock.
- SRAM Universal Derailleur Hanger.
- Fits a Tapered (1.5-1.125) head tube.
- Brake mount Post mount.
- Full-suspension frame.
- Alt shock strokes: 65.
- Sold as a frameset, not a bare frame (on 1 of 2 variants); Sold as a frame only (on 1 of 2 variants).
- Aluminum construction (on 1 of 2 variants); Carbon construction (on 1 of 2 variants).
20 further fields the checker looks for are not published by Transition, so we leave them blank rather than estimate them, and those 20 checks stay silent on this frame. They are minimum rear rotor, shock stroke by size, travel by stroke, minimum fork travel, fork travel hard, drive mode, dropout type, gearbox mount, belt drive, udh unstated, udh retrofit kit, maximum tire mm, maximum tire basis, maximum tire by wheel, head tube upper alts, head tube lower alts, headset included, headset included model, headset included part and maker shocks. 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 2026-08-19.
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) Worth knowing
- 9point8 Fall Line (Dropper Post) Will not fit
- 9point8 Stout (31.8, 30mm) (Stem) 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
6 of 1701 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.