e*thirteen Helix Race Cassette – 12-Speed 9-52t Bronze. The e*thriteen Helix Race 12-speed 9-52t cassette is engineered to deliver precision shifting performance with an industry leading 578% gear range. The proprietary 9 tooth smallest cog combined with the 52t largest 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
Patented 2-Part design provides strength stiffness light weight and ease of service
Aluminum and steel clusters can be replaced separately to reduce service cost
9 tooth high gear allows 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
| Cassette Body Type |
SRAM XD 11/12 Speed |
| Cassette Body Type |
SRAM XDR |
| Cassette Cogs |
9-11-13-15-17-20-23-27-31-36-43-52 |
| Color |
Bronze |
| Defined Color |
Brown |
| Defined Color |
Silver |
| Designed for ebike |
Yes |
| Drivetrain Speeds |
12 |
| Range |
9-52 |
| Weight |
392 |
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