ethirteen Helix Race 12-Speed 9-45T Cassette
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ethirteen Helix Race 12-Speed 9-45T Cassette
ethirteen Helix Race 12-Speed 9-45T Cassette Info
e*thirteen Helix Race 12-Speed 9–45T Cassette is a purpose-built drivetrain upgrade for gravel and XC riders who want more range without adding weight or complexity. Delivering a full 500% gear range in a compact, lightweight package, this cassette brings Helix Race performance to drop-bar and fast off-road builds.
Designed as a true drop-in replacement for SRAM™ XPLR™ 10–44T cassettes, the Helix Race 9–45T increases total range by 13% thanks to its 9-tooth small cog—allowing riders to maintain top-end speed while gaining a lower climbing gear. This expanded range opens up more flexibility in chainring selection and makes the cassette especially appealing for mixed-surface riding, long climbs, and high-speed gravel racing.
The two-piece construction uses replaceable aluminum cogs to reduce long-term service costs while keeping total weight impressively low. Compatible with SRAM®, Shimano®, and TRP® 12-speed shifters and derailleurs with similar cage capacity, the cassette delivers crisp, predictable shifting across the range. It’s also compatible with SRAM Flat-Top chains and XPLR™ derailleurs, making integration into modern gravel drivetrains seamless.
e*thirteen Helix Race 12-Speed 9–45T Cassette Specs at a Glance
- Speed: 12-speed.
- Gear Range: 9–45T (500%).
- Weight: Approx. 330g.
- Driver Body: XD only.
- Compatibility: SRAM®, Shimano®, and TRP® 12-speed shifters and derailleurs with similar cage capacity.
- Chain Compatibility: SRAM Flat-Top compatible.
- Derailleur Compatibility: SRAM XPLR™ compatible.
- Construction: Two-piece design with replaceable aluminum cogs.
Design Benefits
- Expanded Gravel Range: More climbing gear without sacrificing top-end speed.
- Lightweight Performance: Low rotating mass enhances acceleration and efficiency.
- Serviceable Design: Replaceable cogs reduce long-term maintenance costs.
Final Take
The e*thirteen Helix Race 12-Speed 9–45T Cassette is a smart, performance-driven choice for gravel and XC riders who want maximum range in a lightweight, drop-in package. With smooth shifting, broad compatibility, and service-friendly construction, it’s an ideal upgrade for modern off-road drivetrains.
