Cassettes that fit the 2026 Transition Bikes Sentinel Alloy Eagle 90
This bike runs 12-speed, SRAM T-Type Flattop chain, SRAM XD freehub, and its rear derailleur reaches a 52t largest cog.
Worked out from the bike's stock drivetrain — derived: cassette SRAM XS 1275 T-Type (10-52t) spec; chain SRAM GX Eagle Transmission spec; rear derailleur SRAM Eagle 90 spec
Fits as-is
Mounts on the freehub body this bike already has.
- SRAM XS-1275 Eagle Transmission Cassette10–52t
12-speed
- SRAM XS-1295 Eagle Transmission Cassette10–52t
12-speed
- SRAM XS-1297 Eagle Transmission Cassette10–52t
12-speed
- SRAM XS-1299 Eagle Transmission Cassette10–52t
12-speed
Fits with a freehub body swap
These mount once you fit the freehub body they need — a part that comes off the rear hub with the cassette, and costs rather less than a wheel. Check your hub brand offers one before committing.
- SRAM XS-1270 Eagle Transmission Cassette10–52t
12-speed · needs a Shimano HG body
Not sure what the numbers mean? Our cassette guide covers speed counts, gearing ranges and how the freehub bodies differ.
Save this bike to your quiver, log the swap, and we'll remind you before the cassettes wear out — with the right part already picked.
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