The uninterrupted shifting experience of the Ultegra R8100 12-speed cassette range lets you climb, sprint, or cruise without stopping to think about your next gear change. Larger driving cogs maximize drivetrain efficiency and create compatibility with both Shimano 11 and 12-speed Freehub bodies. Hyperglide+ cassettes revolutionized off-road shifting with its seamless shifts both up and down the gear range. Now it's time for the technology to change road cycling. Even during maximal efforts up a climb or racing a friend, riders no longer need to back off to perform a shift. In any gear, Shimano Ultegra R8150 drivetrains maximize efficiency thanks to larger cogs and retain compatibility with existing Hyperglide Freehub bodies. All this while increasing to 12-gears, Ultegra CS-R8100 cassettes are the new paradigm in road shifting. Features Refined 12 step gear combination provides peak efficiency and accelerating performance for every racing situation. Faster, smoother shifts under maximum pedaling force. Compatible with new 12-speed and road 11-speed Freehub body.
The uninterrupted shifting experience of the Ultegra R8100 12-speed cassette range lets you climb, sprint, or cruise without stopping to think about your next gear change. Larger driving cogs maximize drivetrain efficiency and create compatibility with both Shimano 11 and 12-speed Freehub bodies. Hyperglide+ cassettes revolutionized off-road shifting with its seamless shifts both up and down the gear range. Now it's time for the technology to change road cycling. Even during maximal efforts up a climb or racing a friend, riders no longer need to back off to perform a shift. In any gear, Shimano Ultegra R8150 drivetrains maximize efficiency thanks to larger cogs and retain compatibility with existing Hyperglide Freehub bodies. All this while increasing to 12-gears, Ultegra CS-R8100 cassettes are the new paradigm in road shifting. Features Refined 12 step gear combination provides peak efficiency and accelerating performance for every racing situation. Faster, smoother shifts under maximum pedaling force. Compatible with new 12-speed and road 11-speed Freehub body.
The uninterrupted shifting experience of the Ultegra R8100 12-speed cassette range lets you climb, sprint, or cruise without stopping to think about your next gear change. Larger driving cogs maximize drivetrain efficiency and create compatibility with both Shimano 11 and 12-speed Freehub bodies. Hyperglide+ cassettes revolutionized off-road shifting with its seamless shifts both up and down the gear range. Now it's time for the technology to change road cycling. Even during maximal efforts up a climb or racing a friend, riders no longer need to back off to perform a shift. In any gear, Shimano Ultegra R8150 drivetrains maximize efficiency thanks to larger cogs and retain compatibility with existing Hyperglide Freehub bodies. All this while increasing to 12-gears, Ultegra CS-R8100 cassettes are the new paradigm in road shifting. Features Refined 12 step gear combination provides peak efficiency and accelerating performance for every racing situation. Faster, smoother shifts under maximum pedaling force. Compatible with new 12-speed and road 11-speed Freehub body.
The uninterrupted shifting experience of the Ultegra R8100 12-speed cassette range lets you climb, sprint, or cruise without stopping to think about your next gear change. Larger driving cogs maximize drivetrain efficiency and create compatibility with both Shimano 11 and 12-speed Freehub bodies. Hyperglide+ cassettes revolutionized off-road shifting with its seamless shifts both up and down the gear range. Now it's time for the technology to change road cycling. Even during maximal efforts up a climb or racing a friend, riders no longer need to back off to perform a shift. In any gear, Shimano Ultegra R8150 drivetrains maximize efficiency thanks to larger cogs and retain compatibility with existing Hyperglide Freehub bodies. All this while increasing to 12-gears, Ultegra CS-R8100 cassettes are the new paradigm in road shifting. Features Refined 12 step gear combination provides peak efficiency and accelerating performance for every racing situation. Faster, smoother shifts under maximum pedaling force. Compatible with new 12-speed and road 11-speed Freehub body.
Last updated at 06/18/2026 18:34:18
Shimano (Cycling) Ultegra Cs-r8100 Cassette Sprocket 11-34t Icsr810012134
Delivery between 25–29 June $141.38
Shimano CS-R8101 12 Speed Cassette
Shimano Ultegra Cs-r8100 Sprocket Cassette 11-30t 11-34t 12s
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Shimano CS-R8100 Ultegra 12-speed Cassette
Delivery $39.90
Shimano Ultegra CS-R8100 Cassette - 12 Speed - Silver / 11-34 / 12 Speed
Delivery $45.37
originally posted on canyon.com
For indoor trainer, needed to fiddle a bit with washers ect since no clear instructions but good quality product
originally posted on shopee.ph
Quality:GoodSuitability:GoodPerformance:NiceGood product.
originally posted on biketart.com
I came across biketart while searching the Web for a 12 speed shimano ultegra cassette.Found just what I needed at a great price.Thank you bike smart I'm now climbing some of the toughest climbs South Wales has to offer.I'm a first time buyer with biketart. I will be back Great price great service.Thank you.K.Brooks
| Number of reports | 12s |
| Component location | Rear |
Shimano (Cycling) Ultegra Cs-r8100 Cassette Sprocket 11-34t Icsr810012134
Delivery between 25–29 June $141.38
Shimano CS-R8101 12 Speed Cassette
Shimano Ultegra Cs-r8100 Sprocket Cassette 11-30t 11-34t 12s
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Shimano CS-R8100 Ultegra 12-speed Cassette
Delivery $39.90
Shimano Ultegra CS-R8100 Cassette - 12 Speed - Silver / 11-34 / 12 Speed
Delivery $45.37
For indoor trainer, needed to fiddle a bit with washers ect since no clear instructions but good quality product
Quality:GoodSuitability:GoodPerformance:NiceGood product.
I came across biketart while searching the Web for a 12 speed shimano ultegra cassette.Found just what I needed at a great price.Thank you bike smart I'm now climbing some of the toughest climbs South Wales has to offer.I'm a first time buyer with biketart. I will be back Great price great service.Thank you.K.Brooks
A quality Shimano product from the only place that has stock anywhere!Smooth shifting and plenty (12) of gears. What's not to love?
Been using this cassette with my Ultegra R8100 set-up for > 1,200 miles know and have found it to work flawlessly. I was initially concerned that the 1134T wouldn't have enough high gears for descending but other than missing the 16T cog of the 11-30T it has the exact same cogs.The hyperglide+ seems to work perfectly and shifting is quick and smooth.
Ultegra 12 speed 11-34 is a finely engineered piece of bike tech. Works very nicely
Delivered fast, good service. The product met expectations. Cassette was bought for winter pair of wheels.
replaced 1a 11-30 with this 11-34 for a 36/34 climbing gear. Quick shipping and arrived in time for a great wekend!
| Number of reports | 12s |
| Component location | Rear |
