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 2 offers
The lowest price for Shimano CS-R8100 Cassette Ultegra 12 Speed right now is $162.47 at eBay.com.au, compared across 2 retailers.
The all-time low was $76.41 on 4 June 2026 — today's price is 113% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 7 June 2026.
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.
Last updated at 07/06/2026 11:03:42
[new] Shimano Ultegra Cs-r8100 Cassette 12s 11-30t Japan
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-R8101 Ultegra 12 Speed Cassette
Free delivery between 9–15 June
originally posted on condorcycles.com
I haven't fitted this to my bicycle yet so can't comment on longevity, ease of fit etc. One thing I can say is that it feels nice and light in my hand.
originally posted on pushys.com.au
A quality Shimano product from the only place that has stock anywhere!Smooth shifting and plenty (12) of gears. What's not to love?
originally posted on sigmasports.com
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.
| Rear Speeds | 12 |
| Combination | 11-30T, 11-12-13-14-15-16-17-19-21-24-27-30T |
| Technology | Hyperglide+ |
| Shipped Nationally | Yes |
[new] Shimano Ultegra Cs-r8100 Cassette 12s 11-30t Japan
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-R8101 Ultegra 12 Speed Cassette
Free delivery between 9–15 June
I haven't fitted this to my bicycle yet so can't comment on longevity, ease of fit etc. One thing I can say is that it feels nice and light in my hand.
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.
Great product, ideal for sportives with lots of climbing
When no one else could source the new 12 speed components, including shimano itself, Pushys had it in stock at a sensible price and delivered quickly
Ultegra 12 speed 11-34 is a finely engineered piece of bike tech. Works very nicely
It's a Shimano cassette, you can't go wrong, plus REI has free shipping in it!
replaced 1a 11-30 with this 11-34 for a 36/34 climbing gear. Quick shipping and arrived in time for a great wekend!
the part was fine.getting it though after Pushys took my money was another thing.
not a wiggly worm like some other ultegra cassettes
| Rear Speeds | 12 |
| Combination | 11-30T, 11-12-13-14-15-16-17-19-21-24-27-30T |
| Technology | Hyperglide+ |
| Shipped Nationally | Yes |
