Extended Range (EX) Cogs Black<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Includes longer replacement B-limit screw for derailleurs: helps keep the B-limit from max out</li><li>10 speed</li><li>77g</li><li>Cassette body Shimano/SRAM 8， 9， 10 Speed</li><li>Drivetrain Speeds: 10</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51RhjGfJQWL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51asv8dxFhL.jpg" noproxy>