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Your cart is empty.CNC sculpted and engineered cross-experience. e*thirteen Helix is compatible with SRAM Eagle and Shimano 12-speed drivetrains. At 384 grams and 556% range, the 9-50T configuration is the hot setup for your 12 Speed MTB or Gravel bike and allows for a 2-tooth smaller front chainring, shorter chain length, more ground clearance, and higher top-speed with our 9 tooth cog.
Benjamin T. Tais
Reviewed in the United States on April 1, 2025
Shifts pretty good and install was pretty straight forward except the small 3mm bolt that secures the smaller cogs to the larger requires 1nm to tighten. My wrench was at 1.5 which stripped the bolt and it was too small to extract, so $240 wasted.
Russell Turpin
Reviewed in the United States on August 30, 2024
Love these 9-50 cassettes. They light, colorful, and fit perfect with SRAM drivers
daniel oshea
Reviewed in the United States on April 22, 2023
purchased SRAM GX gruppo. decided to try the e thirteen cassette. work perfect with SRAM system. Make sure you install the plastic cone which goes between the 2 cassette parts. (this will make sense if you purchase one). Initially thought it was just packaging. IT ISN'T. Absolutely required.Looks better than SRAM, lighter weight than XX1, better price. Hard to go wrong. Have about 6 rides in so far with it. No problems. Shifts perfect.
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