Product details:

Supercharged shifting with bulletproof precision. Sacrifice nothing not durability, dependability, or performance-nothing. The new 2007 Sram Rival 10-Speed Rear Derailleur matches SRAM's Exact Actuation with tried-and-true competition-proven design and construction. Exact Actuation delivers even gear changes over the entire shifting range via a precise 3mm adjustment from gear to gear. Maximized for 8-, 9-, and 10-speed systems, the Rival's design is descended from SRAM's legendary MTB rear derailleurs. It weighs only 180g but features an all-aluminum B-knuckle inner link and cage that can stand up to any serious rider's demands.