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Mountain Bike Cassettes & Freewheels

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21% Off Full Price
Shimano XT M8000 11 Speed Cassette

Shimano

Shimano XT M8000 11 Speed Cassette

$149.00 Full price
$149.00
Club price
$189.00 Full price
SRAM Eagle PG1230 Cassette 12s 11-50

SRAM

SRAM Eagle PG1230 Cassette 12s 11-50

$186.00 Full price
$186.00
Club price
$189.00 Full price
21% Off Full Price
Shimano Alivio HG51 8 Speed Cassette

Shimano

Shimano Alivio HG51 8 Speed Cassette

$39.00 Full price
$39.00
Club price
$49.99 Full price
25% Off Full Price
Shimano SLX CS-M7100 12 Speed Cassette 10-51

Shimano

Shimano SLX CS-M7100 12 Speed Cassette 10-51

$149.00 Full price
$149.00
Club price
$199.99 Full price
SRAM XG1275 Eagle Cassette 10-52T Black

SRAM

SRAM XG1275 Eagle Cassette 10-52T Black

$397.00 Full price
$397.00
Club price
$399.00 Full price
24% Off Full Price
Shimano XT M8100 12 Speed Cassette 10-51T

Shimano

Shimano XT M8100 12 Speed Cassette 10-51T

$199.00 Full price
$199.00
Club price
$264.99 Full price
Shimano Acera HG41 8 Speed Cassette 11-34T

Shimano

Shimano Acera HG41 8 Speed Cassette 11-34T

$38.00 Full price
$38.00
Club price
$40.00 Full price
37% Off Full Price
Shimano Deore CS-M6100 12 Speed Cassette 10-51T

Shimano

Shimano Deore CS-M6100 12 Speed Cassette 10-51T

$125.00 Full price
$125.00
Club price
$199.99 Full price
Shimano Deore M4100 10 Speed Cassette 11-42T

Shimano

Shimano Deore M4100 10 Speed Cassette 11-42T

$85.00 Full price
$85.00
Club price
$89.99 Full price
25% Off Full Price
Shimano CS-M5100 Deore 11 Speed Cassette

Shimano

Shimano CS-M5100 Deore 11 Speed Cassette

$89.00 Full price
$89.00
Club price
$119.99 Full price
Shimano CS-LG400 11-50 Linkglide Only 11 Speed Cassette

Shimano

Shimano CS-LG400 11-50 Linkglide Only 11 Speed Cassette

$159.00 Full price
$159.00
Club price
$162.00 Full price
Shimano Cues CS-LG700-11 11 Speed Cassette 11-50T (Linkglide Only) Black

Shimano

Shimano Cues CS-LG700-11 11 Speed Cassette 11-50T (Linkglide Only) Black

$225.00 Full price
$225.00
Club price
$233.99 Full price
Shimano CUES Linkglide CS-LG300 10 Speed Cassette 11-48T

Shimano

Shimano CUES Linkglide CS-LG300 10 Speed Cassette 11-48T

$78.00 Full price
$78.00
Club price
$82.99 Full price
SRAM GX XG-1150 11 Speed Cassette 10-42T

SRAM

SRAM GX XG-1150 11 Speed Cassette 10-42T

$265.00 Full price
$265.00
Club price
$269.00 Full price
Shimano CS-HG400 Acera Cassette 11-40T 8-Speed

Shimano

Shimano CS-HG400 Acera Cassette 11-40T 8-Speed

$49.00 Full price
$49.00
Club price
$54.95 Full price
SRAM XS-1275 T-Type Eagle 12 Speed Cassette 10-52T

SRAM

SRAM XS-1275 T-Type Eagle 12 Speed Cassette 10-52T

$399.00 Full price
$399.00
Club price
$430.00 Full price
Shimano CUES Linkglide CS-LG300 9 Speed Cassette 11-46T

Shimano

Shimano CUES Linkglide CS-LG300 9 Speed Cassette 11-46T

$53.00 Full price
$53.00
Club price
$55.99 Full price
34% Off Full Price Clearance
Shimano CS-M8100 Deore XT 12-Speed MTB Cassette 10-51T

Shimano

Shimano CS-M8100 Deore XT 12-Speed MTB Cassette 10-51T

$169.00 Full price
$169.00
Club price
$259.99 Full price
SRAM Eagle XG1275 12 Speed Cassette 10-50T

SRAM

SRAM Eagle XG1275 12 Speed Cassette 10-50T

$389.00 Full price
$389.00
Club price
$397.00 Full price
MicroShift ADVENT X CS-H104 E-Bike Cassette 10 Speed 11-48T Black

MicroShift

MicroShift ADVENT X CS-H104 E-Bike Cassette 10 Speed 11-48T Black

$97.90 Full price
$97.90
Club price
$109.95 Full price
Shimano Deore CS-M4100 10 Speed Cassette 11-46T

Shimano

Shimano Deore CS-M4100 10 Speed Cassette 11-46T

$84.00 Full price
$84.00
Club price
$89.99 Full price
Shimano CS-M8200 XT 12 Speed Cassette 10-51T

Shimano

Shimano CS-M8200 XT 12 Speed Cassette 10-51T

$239.00 Full price
$239.00
Club price
$249.99 Full price
25% Off Full Price Clearance
Shimano SLX CS-M7100 HyperGlide+ 12-Speed MTB Cassette

Shimano

Shimano SLX CS-M7100 HyperGlide+ 12-Speed MTB Cassette

$119.00 Full price
$119.00
Club price
$159.99 Full price
Shimano HG400 9 Speed Cassette 12-36T

Shimano

Shimano HG400 9 Speed Cassette 12-36T

$42.00 Full price
$42.00
Club price
$44.99 Full price
Shimano CS-LG400 Cues 9 Speed Cassette 11-46T - Linkglide Only

Shimano

Shimano CS-LG400 Cues 9 Speed Cassette 11-46T - Linkglide Only

$59.00 Full price
$59.00
Club price
$62.99 Full price
18% Off Full Price
Shimano Deore XT M8100 12 Speed Cassette 10-45T

Shimano

Shimano Deore XT M8100 12 Speed Cassette 10-45T

$219.00 Full price
$219.00
Club price
$269.95 Full price
SRAM Apex PG-1231 XPLR Cassette 12 Speed 11-44T

SRAM

SRAM Apex XPLR 12-Speed MTB Cassette 11-44T

$213.00 Full price
$213.00
Club price
$218.00 Full price
Sunrace 8 Speed 11-34 Cassette

Sunrace

Sunrace 8 Speed 11-34 Cassette

$35.00 Full price
$35.00
Club price
$40.00 Full price
MicroShift Acolyte CS-H083 8 Speed Cassette Black

MicroShift

MicroShift Acolyte CS-H083 8 Speed Cassette Black

$68.00 Full price
$68.00
Club price
$71.95 Full price
SunRace MZ90 12-Speed MTB Cassette 11-50T Black Chrome

Sunrace

SunRace MZ90 12-Speed MTB Cassette 11-50T Black Chrome

$200.00 Full price
$200.00
Club price
$220.00 Full price
20% Off Full Price
Shimano CS-M5100 11-Speed Deore Cassette 11-42T

Shimano

Shimano CS-M5100 11-Speed Deore Cassette 11-42T

$95.00 Full price
$95.00
Club price
$119.99 Full price
MicroShift XLE 10 CS-H103 10 Speed Cassette 11-42T Black

MicroShift

MicroShift XLE 10 CS-H103 10 Speed Cassette 11-42T Black

$94.00 Full price
$94.00
Club price
$99.95 Full price
Shimano SLX HG81 10 Speed Cassette 11-34T

Shimano

Shimano SLX HG81 10 Speed Cassette 11-34T

$94.00 Full price
$94.00
Club price
$99.99 Full price
Shimano Deore XT CS-M8100 Cassette 10-45T 12-Speed

Shimano

Shimano Deore XT CS-M8100 Cassette 10-45T 12-Speed

$239.00 Full price
$239.00
Club price
$249.99 Full price
e*thirteen Helix Plus 12-Speed 9-50T XD Cassette Black

Helix

e*thirteen Helix Plus 12-Speed 9-50T XD Cassette Black

$360.00 Full price
$360.00
Club price
$389.99 Full price
ATA Cassette 12 Speed 11-50T Chrome Plated

ATA

ATA Cassette 12 Speed 11-50T Chrome Plated

$90.00 Full price
$90.00
Club price
$99.99 Full price

Find Your Size

Step 1: Measure your height

  • Take off your shoes
  • Stand with your back straight against a wall
  • Balance a book on your head to mark your height on the wall
  • Measure your height by the distance from the floor to the mark
cm

Find Your Size

Step 2: Adjust your inseam

  • Based on your height, we’ve calculated a starting point.
  • You can measure your inseam by tucking a book between your legs so there is pressure but it isn’t uncomfortable.
  • Inseam typically falls with 5cm of the average.
cm

Find Your Size

Your results

For the we suggest the following size.

More comfort More speed
Height: --
Inseam: --
Adjusted Height: --

Find Your Size

We have saved your measurements.

Recommended sizes will now be highlighted on the page.

Related Categories

Road Bike Cassettes & Freewheels

Road Bike Cassettes & Freewheels

Road bike cassettes and freewheels for every gear setup and riding style. Upgrade your drivetrain with the right sprocket range for climbing, racing, or long rides.

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12 Speed Cassettes & Freewheels

12 Speed Cassettes & Freewheels

Upgrade your drivetrain with 12 speed cassettes and freewheels built for smooth, precise shifting across every ride. Wide range options available online and in store.

Explore More
11 Speed Cassettes & Freewheels

11 Speed Cassettes & Freewheels

Upgrade your 11 speed drivetrain with 99 Bikes range of 11 speed cassettes and freewheels built for smooth, precise shifting.

Explore More
10 Speed Cassettes & Freewheels

10 Speed Cassettes & Freewheels

Shop 10 speed cassettes and freewheels for road, MTB, and commuter bikes. Upgrade your drivetrain with the right gear range for smoother, more reliable shifting.

Explore More
9 Speed Cassettes & Freewheels

9 Speed Cassettes & Freewheels

Upgrade your drivetrain with 9 speed cassettes and freewheels built for reliable shifting across road, MTB and commuter setups. Shop a wide range online now.

Explore More
8 Speed Cassettes & Freewheels

8 Speed Cassettes & Freewheels

8 speed cassettes and freewheels for every riding style. Upgrade your drivetrain with reliable options suited to road, MTB, and commuter bikes.

Explore More
6 & 7 Speed Cassettes & Freewheels

6 & 7 Speed Cassettes & Freewheels

6 & 7 speed cassettes and freewheels for everyday riders and commuters. Reliable gearing upgrades that keep your bike shifting smoothly, available online and in store.

Explore More
Single Speed Cassettes & Freewheels

Single Speed Cassettes & Freewheels

Single speed cassettes and freewheels for every rider and setup. Shop a wide range online and find the right fit for your bike today, with fast delivery available.

Explore More

13 Speed Cassettes & Freewheels

13 speed cassettes and freewheels for riders who want the smoothest, widest gear range available. Shop a great selection online and in store today.

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