ITEM NAME:5pcs Mountain Bike Disc Brake Hub Conversion Disc Bases Description: Made of aluminum alloy material,lightweight and durable. Exquisite workmanship, feeling fine, easy to use. Unique thread design, effectively and directly to make bicycle braking. Hole centre distance: approx. 44mm/1.7inch Thickness: approx. 7.5mm/0.3inch Package Includes: 5 Pieces Threaded Hubs Disk SKU: FUZ0020090654025124.Unique thread design, effectively and directly to make bicycle braking. 5 Pieces Threaded Hubs Disk. People always bought together with. SKU: FUZ0020090654025124.