SRC - Body Material: 6061 Aluminum. - Axle Material: 7075 Aluminum. - Axle Spacing: [Front] QRx100, 15x100, 15x110 Boost, 20x110, 15x150 / [Rear] QRx135, 12x142, 12x148, 12x150, 12x157, QRx170, 12x177, QRx190, 12x197. - Free Hub Body Type: Shimano 8,9,10,11. - Disc Mount: 6 Bolt. - Bearing: [Front] 2 Sealed Cartridge / [Rear] 4 Sealed Cartridge. - Color: Black. - Hole Count: 32. - Weight: [Front] 200g-240g / [Rear] 300g-380g.