e*thirteen Helix Race Cassette - 12-Speed 13-52t Gray Color-Galaxy Black/Red Defined Color Black Brake Lever

Defined Color Black Brake Lever Actuation Hydraulic Rotor Included No Brake Caliper Type Post Mount Hydraulic Fluid Type DOT

Unique cutouts on the base designed to compress upon impact and quickly rebound for continuous shock absorption

}SRAM XX1 11-Speed Rear Derailleur B-Bolt and Limit Screw Kit

Shifting under load is made possible on the XX T-Type 10-52t cassette due to a combination of X-SYNC technology and cassette mapping creating seamless shifts even during your hardest power output

e*thirteen Helix Race Cassette - 12-Speed 13-52t Gray Color-Galaxy Black/Red Defined Color Black Brake LeverThe e*thirteen Helix Race 12 speed 13 52t cassette features close ratio gearing specifically engineered for steep terrain where climbing time and shift frequency is high and descents are gravity driven. By placing more gears where riders spend the majority of the time they can optimize cadence and torque for improved climbing efficiency with smoother shifts under load for both analog and eBikes. Close ratio gearing cassette for improved shifts under