E Thirteen Helix Race 12 speed cassette - Orange

The E Thirteen (E13) Helix Race cassette offers some of the largest gear ratios on the market. In its 9-50 and 9-52 tooth versions, it features an exclusive 9-tooth sprocket that, combined with a two-piece construction, provides a wide range of ratios depending on whether you prefer to climb with power or cadence. 

The 13-52 tooth version, developed for Ebike use but also adopted by traditional MTB riders, optimizes pedaling cadence on climbs while reducing the gap between each sprocket. Say goodbye to the feeling of never being in the right gear—although on descents, you'll have to let gravity do its job!

The 9-45 tooth version is developed for Gravel and XC use and is compatible with Sram 12 speed systems including XPLR and Flat Top chains

Key features of the Helix Race cassette

• One of the widest gear ranges on the market (up to 578%)
• Compatible with Sram, Shimano, and TRP drivetrains
• Precision-machined two-piece design for easy installation and maintenance while minimizing power loss
• Steel and aluminum sprockets can be replaced separately
• The 43-52 and 42-50 sprocket blocks are interchangeable
• The use of a small 9-tooth sprocket allows for a smaller chainring, making technical sections easier while reducing weight and bulk
• Available in multiple anodized colors
• Compatible with both E-Bikes and traditional MTBs

Specifications

• Compatibility: 12-speed Sram, including AXS, Shimano, and TRP derailleurs and shifters
• Not compatible with Sram T-Type drivetrains
• 9-45 version compatible with Flat-Top chains and XPLR derailleurs
• Compatible freehub bodies: XD and XDR
• For Hope XD freehub bodies, a specific spacer is required
• Materials: Top 2 sprockets made of aluminum, remaining 10 sprockets made of steel
• Available versions:
    - 9-45T: 9, 11, 13, 15, 17, 19, 22, 25, 28, 32, 38, 45T
    - 9-50T: 9, 11, 13, 15, 17, 20, 23, 27, 31, 36, 42, 50T
    - 9-52T: 9, 11, 13, 15, 17, 20, 23, 27, 31, 36, 43, 52T
    - 13/52T: 13, 15, 17, 19, 22, 25, 28, 32, 36, 40, 45, 52T
• Number of speeds: 12

Weight: 404g in 9-52T version