Completely re-engineered using insights gleaned from more than 100,000 original Hydra hubs in the field, Hydra 2 features a newly designed 65% thicker axle, larger 6903 bearings with new labyrinth seals, and enlarged pawl pockets that ensure bombproof durability under the most demanding conditions. 6 Pawl Hydra 2 Freehub Body provides a groundbreaking 870 P.O.E. Hydra 2 Freehub body engages every .41 degrees yielding telepathic control. Refined drive ring and increased tooth counts on each pawl provide increased relability and engagement with less drag. 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 remove excess material for a lighter, stronger hubshell. Revised axle design is 65% thicker with an improved stress washer design. Larger, 5.5mm pawl pockets that evenly distribute force 26% better, preventing deformation of the pockets over years of use. Full-contact radial lip seals paired with proximity dust shields keep grit and grime out, and lubrication in. Durable 6903 bearings are used throughout for smooth, long-lasting performance. Item Specifications: Rear Axle: 12mm Thru x 148mm, Cassette Body Type: Micro Spline, Color: Black, Skewer Included: No, Bearing Type: Sealed Cartridge, Weight: 292, Designed for ebike: Yes, Defined Color: Black, Spoke Interface: J-Bend, Hub Drilling: 28, Hub/Brake Compatibility: 6-Bolt Disc,