Industry Nine's strongest aluminum rims and j-bend steel spokes keep the cost of the Hydra2 DH S down, while delivering a wheelset that can stand up to the most abusive DH tracks around the world. Pinch flats are a distant memory thanks to their hollow bead wall technology, and Hydra2's immediate engagement grants you the precision to pull off your dream lines. No matter what you're attempting, the Hydra2 DH S is perfectly suited to soaking up big hits on the way down and braaapping back up to the top on the next generation of ebikes.6 Pawl Hydra 2 Freehub Body provides a groundbreaking 870 P.O.E. Hydra 2 Freehub body engages every .41 degrees yielding telepathic controlHollow Bead Wall promotes increased pinch flat protection and impact resistance"S" is for "Steel" - Employing 32 traditional J-bend steel spokes paired with J-Bend hub series in an economical, easy to service packageAluminum rims are compatible with Tubeless or Tube-Type Clincher tires in the 2.3 - 2.8" width rangeApproved for use on Full Power Class 1 e-bikesItem SpecificationsCassette Body TypeShimano Micro SplineColorBlackDefined ColorBlackDesigned for ebikeYesFront Axle15mm Thru x 110mmHub/Brake Compatibility6-Bolt DiscISO Diameter622 / Road / 29"Rear Axle12mm Thru x 148mmRim MaterialAlloyRim Width (Internal)31Tire TypeTubeless ReadyValvePrestaWheel Size29" Industry Nine Hydra 2 DH S Wheelset Wheelset UPC: 197769023217