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ShimanoCS-M5100 Cassette

Sale $67.14 - $99.99

Item # SHIU1CD

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  • 11 Speed, 11-42T ($67.14)
  • 11 Speed, 11-51T ($99.99)
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Item # SHIU1CD

CS-M5100 Cassette

With a focus on gear steps to help maintain performance and maximum cadence control, Shimano’s CS-M5100 Cassette for 11-speed drivetrains keeps you churning the correct cog no matter the terrain. The wide gear range may postpone your drop-in for the 12-speed group a bit longer, as the M5100 is undoubtedly designed to be a dependable workhorse and a worthy weekend racer. With terrain specific options, the 42-tooth or 51-tooth, you can ride long tempo climbs or have bail-out, switchback crusher. And the 11-speed design still allows a fast downhill 11-tooth cog to motor back to the trailhead.

  • Eleven-speed mountain bike cassette for all-mountain epics
  • Range for tight cross-country racing or bail-out trail grinding
  • Designed for controllable gear jumps to minimize cadence changes
  • Shimano's components have reliable function and simplicity

Actual Weight

11 Speed, 11-42T
11 Speed, 11-51T

Actual weights are measured in-house by the Competitive Cyclist team.

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What do you think about this product?


>Rating: 5

11/51 cassette happy

I've put it through the wringer
True to size
Size Bought
5` 10"
190 lbs

The 11/51 provides a wide gear choice. Makes the knees happy. Shifts are crisp and precise. You should run a steel freehub, as the cassettes splines will gouge a aluminum freehub, and ruin it. With steel freehub, no problem. The cassette holds up extremely well in all conditions. I run it on a Pivot Mach 429 trail, 2x11 drivetrain. Riding trails from Michigan to Colorado to Arizona. I have worn out 2 cassettes in 3 years, due to rocks in Utah and Arizona.


What cassettes have that screaming sound