Shimano XTR CS-M9101 Cassette — 12-Speed, 10-51T, Micro Spline, Mountain Bike

Shimano XTR CS-M9101 is a lightweight 12-speed 10-51T mountain cassette with titanium and alloy sprockets for race-level performance and a massive gear range.
Race-light 12-speed XTR range, genuine Shimano, brand new.
Will it fit? This is a 12-speed 10-51T cassette for a Shimano Micro Spline freehub. A standard HG freehub will not accept it. For Shimano 12-speed mountain drivetrains (XTR, XT, SLX, Deore), pair with a 12-speed HYPERGLIDE+ chain.
Key Specifications


Brand
Shimano


Series
Shimano XTR M9100


Model
CS-M9101-12


MPN
ICSM9101051


UPC
192790893327


Type
Cassette


Speeds
12-Speed


Range
10-51T (510%)


Mount/Interface
Micro Spline (required)


Material
Titanium / steel / aluminum


Weight
367 g (12.9 oz)


Color
Silver


Country of Origin
Japan


Condition
Brand new, original Shimano retail packaging


Technology Highlights


✓  Huge 10-51T range, 510% spread for steep climbs and fast straights.

✓  Titanium and alloy sprockets, flagship light weight at 367 g.

✓  HYPERGLIDE+, fast, shockless shifting in both directions under power.

✓  BEAM SPIDER construction, carries the large sprockets on an alloy carrier to save weight.

✓  M9101 revision, the noise damping spacer is bonded to the cassette rather than supplied loose.

What's in the Box

1 × Shimano XTR CS-M9101 12-speed cassette (10-51T)
Lockring & documentation (as supplied)
Original Shimano retail packaging


Brand new in retail packaging. Ships from Ontario, California (US domestic) · Estimated delivery 3–5 business days · Free 30-day returns.