ITEM NAME:Bike Front & Rear Hub Disc Brake 5, 6, 7, 8, 9 Speed Flywheel Hubs 36 Holes Description: Constructed of CNC anodized aluminum alloy, durable and lightweight. Bike brakes hubs, disc brake commonly used. 36 holes disc brake hub set, with quick release skewers. Low-friction seals effectively shut out water, mud and dirt . Compatible with 5, 6, 7, 8, 9 speed flywheel. Specification: Material: Aluminum Alloy Color: Black Spoke Holes: 36 Front Hub: 100mm/3.9inch Rear Hub: 135mm/5.3inch Braking System: Disc Brake Package Includes: 1 Piece Front Hub 1 Piece Rear Hub 1 Piece Front Quick Release Skewers 1 Piece Rear Quick Release Skewers SKU: DMO0021299065007641.Bike brakes hubs, disc brake commonly used. Compatible with 5, 6, 7, 8, 9 speed flywheel. 36 holes disc brake hub set, with quick release skewers. 1 Piece Rear Hub. 1 Piece Front Hub. Spoke Holes: 36.