With the largest range, lightest weight and best price on the market, Helix components are engineered to bridge the compatibility gap between SRAM™ and Shimano™ components, ensuring versatility and flawless performance. Future-proof your bike with e*thirteen Helix.

• Compatible with both SRAM and Shimano 12 speed drivetrains
• Replaceable steel and 42/50 tooth clusters, reverse compatible with TRS+ 9-50T parts
• Improved shifting performance
• Improved interface between steel and aluminum clusters
• 9-50T range: 9, 11, 13, 15, 17, 20, 23, 27, 31, 36, 42, 50
• 556% range, more than any other option on the market
• 346g for a 9-50T 12 speed cassette
• Uses SRAM XD driver