<p>Aluminum alloy mountain bike hub with 32 holes, suitable for disc brake systems. The hub features a quick release front and rear, with a barrel shaft version of front 100*15mm and rear 142*12mm. It has 2 bearings at the front and 4 bearings at the rear, making it a reliable choice for cycling enthusiasts. The hub is available in various colors, including black, silver, red, blue, gold, purple, and dazzling. It is designed to be lightweight, with a weight of approximately 470g/pair for the quick release version and 461g/group for the TA version.</p>