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-bikes TECH SPECS table{border-collapse:collapse;width:100%;} td{text-align:left;padding:8px;font-weight:350;} tr:nth-child(even){background-color:#f2f2f2} th{background-color:#eb212e;color:white;text-align:left;padding:8px;} .desc .specs-heading{font-size:24px;font-weight:600;padding-top:35px;border-top:3px solid #f0f0f0;display:inline-block;border-bottom:4px solid #eb212e;width:142px;margin:0;} Rear Axle 12mm Thru x 157mm Rim Width (Internal) 31 Cassette Body Type Shimano HG Front Axle 20mm Thru x 110mm Boost Valve Presta Color Black Wheel Size 29" Designed for ebike Yes Defined Color Black ISO Diameter 622 / Road / 29" Tire Type Tubeless Ready Rim Material Alloy Hub/Brake Compatibility 6-Bolt Disc