Description: - Material: CNC Precision Technology Disc Brake made of Aluminum alloy material, sturdy, durable, rust resistant and high strength. Sealed bearings provide high waterproof performance, low resistance force for smooth rotating. - Spoke Holes: 32 Holes, 6 Pawls freehub with clear sound, front 100 mm; rear 135 mm. Size Front: 9mmx100mm, rear:10×135mm. - Easy to Use: Lightweight and portable, easy to install and quick to remove, suitable for disc brake mountain bikes. - Replace Parts: Replacement for bike hub repair parts. - Application: The cassette body is suitable for most speed cassettes(7-12) (commonly used for HG cassettes). Specification: - Material: Aluminum Alloy - Sealed Bearings: 2 Front bearings; 4 rear bearings - Front 100 mm/Rear 135 mm - Pawls: 6 - Hole: 32holes - Speed: 7-12 Size Chart: Front: 9mmx10cm/0.35inchx3.94inch Rear: 1cmx13.5cm/0.39inchx5.31inch Package Includes: (Depends on your choice) StyleA: 1 Pair (Front and Rear Hub, Front and Rear Levers) : 1 Pair With Hat (Front and Rear Hub, Front and Rear Levers, 4 Caps) StyleC: 1 Front ( 1 Front Hub, 1 Front Lever) StyleD: 1 Rear ( 1 Rear Hub, 1 Rear Lever)