Completely re-engineered using insights gleaned from more than 100000 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 ebikesScalloped flanges on Hydra2 j-bend hubs increase overall strength and remove excess material for a lighter stronger hubshellRevised axle design is 65% thicker with an improved stress washer designFull-contact radial lip seals paired with proximity dust shields keep grit and grime out and lubrication inDurable 6903 bearings are used throughout for smooth long-lasting performance 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;} Front Axle 20mm Thru x 110mm Boost Color Black Bearing Type Sealed Cartridge Weight 157 Defined Color Black Spoke Interface J-Bend Hub Drilling 32 Hub/Brake Compatibility 6-Bolt Disc