Free SF Express shipping for purchases over HK$800 on this official website in Hong Kong and Macau ***Excludes products weighing more than 5 kg or with the longest side exceeding 60cm***

Free shipping in Hong Kong when spending HKD2,000 or above! !

e*thirteen | Helix Race Cassette ‖Gear range up to: 556% ‖Weight: 384g‖
The E13.HELIX Race cassette is an upgrade to your Shimano or SRAM Eagle drivetrain and offers greater range than any other cassette on the market. The 9-tooth gear allows you to have a lighter sprocket size while maintaining the same top end, allows for better ground clearance, and provides a lighter overall drivetrain. The gear ratio range is as high as 556%. The reliability of PVD surface treatment technology can be doubled.

‖Product Features‖
+Compatible with SRAM™ and Shimano™ 12-speed drivetrains
+Upgrade your Shimano or SRAM Eagle drivetrain
+9-tooth gear design - a lighter sprocket. Provides better ground clearance and provides a lighter overall drivetrain
+2-pack design allows riders to replace aluminum alloy sprockets or steel sprockets individually without having to replace the entire flywheel.
+PVD surface treatment technology improves reliability

Wave head: only compatible with XD™ and XDR™ Drivers
Material: 2-tooth aluminum alloy sprocket, 10-tooth steel sprocket. Gear ratio range: 556%
Size: 9-50T: 9, 11, 13, 15, 17, 20, 23, 27, 31, 36, 42, 50
Speed: 12 speed Weight: 384g Warranty: 5 years