Shimano Ultegra CS-6600 Sprocket with Built In Spacer - 11T - Y1Z81100D

A replacement 10 speed cassette sprocket for use in 11/23t set ups. This is the 11t sprocket with built in spacer.

This is an "A" match for the following cassettes:

• Shimano Dura-Ace CS-7800
• Shimano Dura-Ace CS-7900
• Shimano Ultegra CS-6700

"A" match: indicates that the parts are the same (material, finish, size & appearance).

If this sprocket is unavailable, then you can use the "B" match sprocket.

• Shimano 105 CS-5600

These cassettes require a Shimano TL-LR15 lock ring removal tool.