E-Thirteen Helix 12 Speed Race Cassette - XD Driver - Purple - 9-50T - 12 Speed Heavy/Bulky riders with a sit bone

riders with a sit bone measurement of 100-129mm should choose the 142mm saddle

Number of gears: This is an 11-speed cassette

649 710845808272 Bluto A1 - 2015-2018 - Full Service 11

Who's this item for: Riders who own a Cane Creek headset and need a replacement bearing for it

E-Thirteen Helix 12 Speed Race Cassette - XD Driver - Purple - 9-50T - 12 Speed Heavy/Bulky riders with a sit boneThe HELIX R Cassette is an upgrade to any SRAM Eagle or Shimano drivetrain, with more range than any other cassette on the market. The 9 tooth cog lets you step down one chainring size while keeping the same top end gearing and provides not only better ground clearance but an overall lighter drivetrain. The improved tooth profile of the Helix cassette's features Shimano 12 speed level shifting performance with the improved reliability of a steel and