SRAM Force XG-1270 10-30 12 Speed Cassette Size:10-30 SpecificationsUpper Construction: Moisture-wicking four-way-stretch breathable

SpecificationsUpper Construction: Moisture-wicking four-way-stretch breathable mesh

as well as the brand new 12sp Shimano 105 groupsets

FeaturesRosso Corsa: Castelli's Rosso Corsa label is only applied to the highest-level products they make

About Shimano Altus RD-M370 9 Speed Rear Derailleur BlackThe 9-speed SHIMANO ALTUS M370 rear derailleur uses its MEGA 9 DRIVE TRAIN design to deliver smooth

Road and Cyclocross

SRAM Force XG-1270 10-30 12 Speed Cassette Size:10-30 SpecificationsUpper Construction: Moisture-wicking four-way-stretch breathableAbout SRAM Force XG 1270 10 30 12 Speed Cassette Designed for the next generation of drivetrainsand the next generation of riders. The SRAM Force XG 1270 cassette is optimized for electronic shifting and features SRAM's X Range gearing technology. Smooth, precise shifts, from 10T on up. Features Features at least five one tooth jumps for a smoother gear progression 10 tooth start helps provide a wider gearing range Designed to work with an XDR driver