Shimano CS-R8100 Cassette Ultegra 12-Speed
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.
in 15 offers
The lowest price for Shimano CS-R8100 Cassette Ultegra 12-Speed right now is $92.60 at Plaza Japan, compared across 15 retailers.
The all-time low was $45.79 on 23 Oct 2026 — today's price is 102% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 27 Oct 2026.
Last updated at 27/10/2026 18:27:14
Shimano (Cycling) Ultegra Cs-r8100 Cassette Sprocket 11-34t Icsr810012134
Delivery between 3–5 Nov $144.12
Shimano CS-R8101 12 Speed Cassette
Shimano CS-R8100 Cassette 12-Speed Ultegra, 11-34T
Delivery between 30 Oct – 9 Nov $12.94
Shimano Ultegra CS-R8100 Cassette 12SPEED
Shimano Cassette Ultegra CS-R8100 12-Speed 11-34T
Free delivery between 30 Oct – 9 Nov
Shimano CS-R8100 12 Speed Ultegra Cassette Ultegra (11-34T)
Delivery between 30 Oct – 9 Nov $15
Shimano Ultegra R8100 12sp Cassette 11-34T
Delivery $12.61
Shimano Ultegra CS-R8100 12sp Cassette 11-34T
Delivery $36.26
Shimano CS-R8100 Cassette 11-34 Ultegra 12-Speed
Free delivery
Shimano R8100 12spd Cassette - 11-34T
Delivery between 30 Oct – 10 Nov $18
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 3–5 Nov $144.12
Shimano CS-R8101 12 Speed Cassette
Shimano CS-R8100 Cassette 12-Speed Ultegra, 11-34T
Delivery between 30 Oct – 9 Nov $12.94
Shimano Ultegra CS-R8100 Cassette 12SPEED
Shimano Cassette Ultegra CS-R8100 12-Speed 11-34T
Free delivery between 30 Oct – 9 Nov
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 |
