Cassettes that fit the 2025 Rocky Mountain Instinct Carbon 50
This bike runs 12-speed, Shimano Hyperglide+ chain, Shimano Micro Spline freehub.
Worked out from the bike's stock drivetrain — derived: cassette Shimano SLX CS-M7100-12 (10-51T) spec; chain Shimano M6100 spec; rear derailleur Shimano M8200 spec
Check your freehub body first
Speed count, chain family and derailleur range all line up on these. Whether each one mounts comes down to the body on your rear hub, which this bike ships with more than one of. How to identify yours.
- Shimano 105 7101, 11-34, 12 speed11–34t
12-speed
- Shimano 105 CS-R7101-1211–34t
12-speed
- Shimano Dura-Ace CS-R9200-12 (11-30T)11–30t
12-speed
- Shimano Dura-Ace CS-R9200-12 (11-34T)11–34t
12-speed
- Shimano HG710 11-36T 12S11–36t
12-speed
- Shimano Ultegra CS-R8101-12 (11-30T)11–30t
12-speed
- Shimano Ultegra CS-R8101-12 (11-34T)11–34t
12-speed
Not sure what the numbers mean? Our cassette guide covers speed counts, gearing ranges and how the freehub bodies differ.
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