E Active, Brose/SRAM, 55mm, Black

- Updated construction for improved durability\n- Allows 9 degrees of rotation at the spider, reducing the effects of chain growth that reach the riders feet. This results in the feel of riding chainless\n- Reduces the negative effects of chain growth on suspension performance\n- Requires a 104 BCD chainring. Fits 32-36t chainrings\n- Chainring bolts sold separately