Brand New, 54 tooth ratchet upgrade kit installed, 32 hole, 6 bolt, SRAM XD freehub hub/driver. This set of DT Swiss hubs is perfect for mountain bike enthusiasts looking for high-quality components to enhance their ride. The front hub features a 15x110 BOOST interface and the rear hub features a 12x148 BOOST interface, making them compatible with a wide range of bikes. The hubs are made of durable aluminum and come with a 54T Ratchet upgrade already installed and XD freehub. Additionally, the set includes both the front and rear hubs, making it a great value for cyclists who want to upgrade their entire wheelset. The 32H spokes and 6Bolt rotor compatibility. This set a great choice for any mountain biker looking for reliable hubs.