Helix Race Cassette

The e*thriteen Helix Race 12-speed cassette is engineered to deliver precision shifting performance with an industry-leading gear range. The proprietary 9-tooth smallest cog enables the use of a smaller chainring for improved clearance, lighter system weight, and a lower bail-out gear ratio without high gear compromise. Seamless cross-compatibility with Shimano, SRAM, and TRP 12-speed drivetrains The patented 2-Part design provides strength, stiffness, lightweight, and ease of service Aluminum and steel clusters can be replaced separately to reduce service cost 9-tooth high gear allows the use of smaller chainrings for clearance and weight savings Fits XD™ and XDR™ Drivers Only (Hope XD drivers are undersized at the clamp location and require a Cassette Shim Kit -Sold Separately) Tested extensively for analog and e-bike use Helix Race Cassette 9-45t Range: 9-45t, 500% Cassette Cogs: 9-11-13-15-17-19-22-25-28-32-38-45 Rear Speeds 12-Speed Weight: 319 grams Freehub: SRAM XD