e*thirteen Helix Plus 12-Speed 9-50T Cassette - Black Size:9-50 or interactive rollers that use

or interactive rollers that use the ANT+ FE-C or FTMS BLE protocol

Each lightweight and durable set contains everything you need to get back on the trail when you’re faced with a puncture that just won’t seal

Shimano's legendary 105 12-speed group - incredible performance value

Constructed from an ultralight two-way stretch shell and four-way stretch liner

e*thirteen Helix Plus 12-Speed 9-50T Cassette - Black Size:9-50 or interactive rollers that useEngineered for E bike durability and cross experience compatible with SRAM, Shimano, and TRP Shifters and Derailleurs of the same gearing count and similar cage capacity. This 9 50T combination is the hot setup for your 12 Speed MTB and allows for a 2 tooth smaller front chainring, shorter chain length, more clearance, and range with our exclusive 9 tooth smallest cog. Future proof your bike, and save weight and cash with the Helix Plus Cassette.