The e*thirteen Helix Race cassette is a high-bandwidth, super-lightweight cassette designed for racing.
The smaller sprockets are made of steel for strength, and the large sprockets are made of high-strength aluminum for weight optimization. The result is a lightweight yet very durable cassette for SRAM and Shimano 12-speed drivetrains.
The tooth contours have been optimized for better shifting performance, and for versatility, the cassette conforms to the SRAM XD standard.
| Color: | Grey | 
| Weight: | 467g | 
| Activity: | Cycling | 
| Material: | Aluminium, Steel | 
| Item code: | ETH647327 | 
| Gear ratio: | 13-15-17-19-22-25-28-32-36-40-45-52 | 
| Model year: | 2023 | 
| Freehub body: | XD (SRAM 11/12s MTB), XDR (SRAM 12s Road) | 
| Manufacturer: | e*thirteen | 
| Product name: | e*thirteen Helix Race Cassette | 12-Speed | 13-52 Teeth | SRAM XD/XDR - grey | 
| Weight source: | Manufacturer | 
| Shifting system: | 12-speed | 
| Usage bikesport: | E-Bike, MTB | 
| Manufacturer page: | http://bythehive.com/e-thirteen/ | 
| Manufacturer item code: | FW2HRA-110 |