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New Shimano Ultegra Bicycle Cycle Bike CS-R8101 Ultegra 12-Speed Cassette 11-34

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Regular price £99.99 GBP
Regular price Sale price £99.99 GBP
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  • 30 day warranty on used parts. Manufacturer warranty on new parts.

  • Always the best price on the net

  • Part exchange/Trade in service



Shimano Ultegra Bicycle Cycle Bike CS-R8101 Ultegra 12-Speed Cassette Silver




The Shimano Ultegra R8101 12 Speed Cassette is optimised to shift with exceptional smoothness and precision. It features Shimano's Hyperglide+ gear shifting technology for outstanding gear shifting accuracy and efficiency. And it's compatible with Shimano 12-Speed drivetrain systems.

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.

Additional Features:

• Better chain engagement, stronger retention, and smoother pedalling provide greater power and confidence over rapidly changing terrain.

• Definitive up and downshifting in both directions boost riders’ concentration and acceleration.

• An ultra-efficient drivetrain with smoother power transmission increases comfort and reduces rider stress.

• A wide range of gearing choices, cassette options and the choice of a single or double front chainring, support a wide variety of riding styles, abilities and preferences.


HYPERGLIDE+ cassettes revolutionised off-road shifting with their seamless shifts both up and down the gear range. Now it’s time for 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.

HYPERGLIDE+ drivetrain’s redesigned cassette and chain promote the next generation of competitive bike riding by enhancing speed, shifting efficiency and smoothness over any terrain.


Brand new in box


Secondhand Bike Parts Ltd

✨ WHY CHOOSE US? We pride ourselves on offering a curated selection of high-quality second-hand bike parts catering to various cycling disciplines including road, mountain biking (MTB), gravel, and Cyclocross.  Our team is dedicated, each with a passion for cycling, ensuring we understand the needs of our customers intimately.

💳 PAYMENT METHODS: We accept PayPal, Credit/Debit Card, Bank Transfer and payment through eBay.

🛡️ WARRANTY: Rest easy with our 30-day warranty on all parts.

🔄 PART EXCHANGE: Got old parts? Trade them in with us towards your next upgrade, parts must be worth a minimum of £200 and all offers will be at trade price.

🤝 EPIC CUSTOMER SERVICE: Expect nothing less than exceptional service with a personal touch.  Feel free to check out our 100% positive feedback rate on eBay and Facebook.

🚚 SHIPPING: Get your parts fast with our next day delivery.  Collection is also available depending on the parts location (we are based in Birmingham and London)

New Shimano Ultegra Bicycle Cycle Bike CS-R8101 Ultegra 12-Speed Cassette 11-34
  • £99.99