Shimano Zee M640 Front Hub Ripping down the peak demands durability and reliability when it comes to hubsets. The new Zee hubs are extra tough, smooth running hubs to provide a huge advantage when you're bombing down the artery-like trail systems at the local mountain bike park. With quality sealing and adjustable angular contact bearings, the Zee hubs also spin on extra stiff, one piece rear axles with integrated cone construction. Throw the Zee front hub on any modern gravity build for bomproof performance from the top of the lift to the bottom of the mountain! Adjustable cup & cone angular contact bearings 20mm thru axle only Hub Drilling: 32 or 36 Spoke Type: J-Bend Hub/Brake Compatibility: Center-Lock Disc | Shimano Zee HB-M640 Front Hub 20mm Thru-Axle, 32 Hole, Centerlock