Shimano Dura-Ace CS-9100 11-Speed 11-25t Cassette

Gear combination: 11-25T, 11-28T, 11-30T (New gear combination), 12-25T, 12-28T
Closer gear combination: 11-25T/12-25T
CFRP & Alloy spider arm, 5 titanium sprockets
Wider gear combination: 11-28T/12-28T/11-30T (new gear combination)
Rider tuned gearing
Lightweight

First, you'll get 5% back in store credit to use towards future purchases.

When you purchase through us, you get:

• Advice on whether the bike or product suits your needs.
• A professional build for all bikes, which ensures safety. If there is an issue, we can promise you that 99 out of 100 times, it will be resolved quicker than you can in your garage.
• A build history that becomes a service history, ideally. That can be very helpful if you do have any sort of warranty issue.
• Warranty support - Just contact us and we will guide you through the process.