Description: Mountain bike disc brake hub, quick release disc brake, mountain bike hub, bicycle accessories Spoke holes: 36 holes. Front 100mm/3.94inch; Rear 135mm/5.31inch Material: aluminum alloy (housing) + chrome steel (shaft) Speed: support 7-11 speed (7 speed need to add 2 tower base gaskets) Weight: front hub: 275g; rear hub: 460g Specification: Material: Aluminum alloy+ chrome steel Spoke Holes: 36 Package Includes: Front rear hub: 1 Piece Front Hub 1 Piece Rear Hub 1 Piece Front Quick Release 1 Piece Rear Quick Release Front hub: 1 Piece Front Hub 1 Piece Front Quick Release Rear hub: 1 Piece Rear Hub 1 Piece Rear Quick Release Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement.