E-MTB Cassettes

E-MTB drivetrains face unique demands. Higher torque, heavier bikes, and riders who push harder knowing they have motor assistance. Every Helix and TRS cassette is tested extensively for E-MTB use.

The Helix Race 13-52T was purpose-built for electric mountain bikes. Pair the 13T with a 32T chainring at 85rpm cadence and you'll hit speeds just above 32kmph/20mph, right where most motors cut out. The 52T climbing gear and closer ratio steps help you clean technical climbs with newfound ease. Close enough that you're never hunting for the right gear, wide enough that gravity does the work on descents.

The Loam Wolf tested the 13-52T on a Turbo Levo and found "shifting under load was significantly improved," noting they "grew to trust that the up shifts won't be as harsh, even on the steepest of climbs and under full power of the motor."

Prefer maximum range over close ratios? The 9-52T delivers 578% range for riders who want every gear imaginable. The 9-50T and 9-46T options work beautifully on E-MTB builds too. Match to your terrain and riding style.

Like all Helix cassettes, E-MTB options deliver seamless compatibility with SRAM®, Shimano®, and TRP® shifters and derailleurs. Patented two-piece aluminum/steel construction means you replace clusters separately, cutting service costs and reducing waste.

XD driver required.