Vanquish Products Aluminum Center Hubs XD Series These work with 1.9 and 2.2 KMC Enduro wheels and 1.9 KMC XD127 Bully wheels The center hub rests between the wheel and the SLW hub, attached by the included screws Hub adds .100 offset Includes the Following: 2pcs Center Hubs 13pcs 4-40 x 3/8 SHCS