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Shimano XTR CS-M9101 Cassette 12-speed

Shimano XTR CS-M9101 Cassette 12-speed


Shimano XTR M9100 - Back to where it all started.

The Shimano XTR M9100 group was developed to meet the demands of mountainbike racers at the highest level and guarantees "second to none" performance. The range offers the most versatile components for XC, Enduro and Marathon races.

It all started with the search for the ultimate MTB racing components and now the XTR continues 27 years of innovation with even more speed, focus and control. It is jam-packed with the technological advantages needed to push the boundaries of today's insanely demanding courses.

It is lighter, smoother, more durable and versatile to transfer all pedal-pounding watts into ground speed with extreme efficiency.


Shimano XTR CS-M9101-12 cassette

The Shimano XTR CS-M9101 cassette is characterised by its Beam Spider construction which enables enormous weight savings and at the same time promises long durability. Not only the spider but also the three largest sprockets are made of aluminium. The highlight, however, are the 5 medium sprockets made of titanium. The incredibly light cassette also features the Hyperglide+ technology which guarantees high shifting speed, precision and smoothness when shifting up and down and contributes to an extremely quiet drivetrain.

The 12-speed cassette is available in 2 versions: 10-45 and 10-51 teeth. The 10-45 teeth cassette produces as few gear jumps as possible while the 10-51 teeth cassette covers a wide gear range.


The conventional Hyperglide technology ensures smooth shifting upwards thanks to small shifting ramps, which guide the chain towards the next larger sprocket. Also Hyperglide+ uses this functionality but applies it in the opposite direction, too, preventing the chain from falling down when shifting downwards. The result is a smooth and consistent shifting in both directions, free of vibrations and without disrupting the cadence.

Micro Spline

The aluminium freewheel with 22 evenly spaced teeth keeps the cassette firmly under control for immediate response and also allows the use of a 10 teeth sprocket. In addition, the smaller and compared to the usual Hyperglide freewheel bodies more extensive gearing prevents rotor damage.



10-12-14-16-18-21-24-28-32-36-40-45 teeth
10-12-14-16-18-21-24-28-33-39-45-51 teeth


sprockets 1 to 4: steel (plated)
sprockets 5 to 9: titanium (shot-peened)
sprockets 10 to 12: aluminium (painted)
spider: aluminium (anodised)

Weight (manufacturer's specs)

approx. 357 grams (10-45 teeth)
approx. 367 grams (10-51 teeth)

Fact Sheet of Shimano XTR CS-M9101 Cassette 12-speed

Product Name: Shimano XTR CS-M9101 Cassette 12-speed
Manufacturer: Shimano Parts
Item Code: SHI503213
activity: Cycling
material: Aluminium, Titanium, Steel
usage bikesport: MTB
shifting system: 12-speed
Freehub Body: Micro Spline (Shimano 12s MTB)
Model year: 2023
weight: 357g
manufacturer item code: ICSM9101045 / ICSM9101051
Manufacturer page: