Industry Nine Hydra 2 Classic Front Hub - 15 x 110mm, 6-Bolt, Bronze, 28HCompletely re engineered using insights gleaned from more than 100,000 original Hydra hubs in the field, Hydra2 features a newly designed 65% thicker axle, larger 6903 bearings with new labyrinth seals that ensure bombproof durability under the most demanding conditions. Designed specifically for trail, enduro, and downhill riders with the strength to handle full power ebikes Scalloped flanges on Hydra2 j bend hubs increase overall strength, and