RM-10 Rear Shimano's new 12-speed cassettes are

Shimano's new 12-speed cassettes are available with two different gearing options — the 10 - 51-tooth Wide Range option

Stainless steel/Aluminum/Stainless steel 3-layer sandwich structure

The 148x12mm adapters also come with a shorter bolt action slider tube

Also available in 24oz Big Mouth option

- Lens Gasket: TPE

RM-10 Rear Shimano's new 12-speed cassettes areThe RM 10 is designed specifically for bikes featuring the Ritchey 10mm Saddle Clamp standard. It enables the rider to replace the cylinder nuts that secure the clamp to the seatpost with a bracket that holds a hydration system. The Arch clamp allows for 14of adjustment allowing the cage to slide under saddles with a transition tab. To add to the versatility this system can run 1 or 2 cages to customize for training or racing. Replaces the cylinder