Shimano
Dura-Ace CS-7900 10-Speed Cassette

Backorder: This item is currently out of stock but is available to purchase today as a backorder. The expected availability date shown above is our best estimate as to when it will be shipped to you, but this date is subject to change based on our receipt of this item from its vendor. Shipping in the continental US is free for all backorder items (for international orders, our customer service team will contact you when the item is available to ship). Your credit card will not be charged until your item ships (Paypal requires payment up front, but you can cancel for full refund). Anytime prior to shipment, your backorder can be cancelled by contacting our customer service team.

Now with plenty of gearing options, the new Dura Ace cassette is perfect for a variety of riders and applications. And, it's new alloy carrier saves weight and increases stiffness over previous models.

Works best when used with the 7900 series chain but it also compatible with older Shimano 10 speed chains. All sizes are back compatible and work with the RD-7800 or RD-7900 rear derailleur except for the 11/28 model which requires greater chainwrap capacity and the use of the RD-7900.

• 11/21 Tooth (11, 12, 13, 14, 15, 16, 17, 18, 19, 21); 155 grams
• 11/23 Tooth (11, 12, 13, 14, 15, 16, 17, 19, 21, 23); 161 grams
• 11/25 Tooth (11, 12, 13, 14, 15, 17, 19, 21, 23, 25); 178 grams
• 11/27 Tooth (11, 12, 13, 14, 15, 17, 19, 21, 24, 27); 182 grams
• 11/28 Tooth (11, 12, 13, 14, 15, 17, 19, 21, 24, 28); 185 grams
• 12/23 Tooth (12, 13, 14, 15, 16, 17, 18, 19, 21, 23); 178 grams
• 12/25 Tooth (12, 13, 14, 15, 16, 17, 19, 21, 23, 25); 185 grams
• 12/27 Tooth (12, 13, 14, 15, 16, 17, 19, 21, 24, 27); 190 grams