E-Thirteen Helix 12 Speed Race Cassette - XD Driver - Grey - 9-50T - 12 Speed Heavy/Bulky The AirEvac ventilation system integrates

The AirEvac ventilation system integrates with Smith goggles and eyewear for fog-free lenses and the VaporFit dial adjustment system offers 270-degree fit adjustment with the turn of a dial

Sure it won't be quite as stiff as a Boost specific hub

What makes this the ultimate computer

The most aggressive model dedicated to e-bikes: made for those who seek fun and performance without compromises

Compatibility: DT Swiss hubs only

E-Thirteen Helix 12 Speed Race Cassette - XD Driver - Grey - 9-50T - 12 Speed Heavy/Bulky The AirEvac ventilation system integratesThe HELIX R Cassette is an upgrade to any SRAM Eagle or Shimano drivetrain, with more range than any other cassette on the market. The 9 tooth cog lets you step down one chainring size while keeping the same top end gearing and provides not only better ground clearance but an overall lighter drivetrain. The improved tooth profile of the Helix cassette's features Shimano 12 speed level shifting performance with the improved reliability of a steel and