The 6" Spun Aluminum nose wheel with 5/8 bearings. Comes centered when using the MX o-ring standard wheel hub. Can be used with or without a tube. The bearings are centered and rim halves are mounted from each side. Nose wheels comes complete with nuts, bolts, washers, valve stem, o-rings. May also be used as main wheels. Wheel width options 3.5" half's for 6" wheels and 2.5" in 5" wheel half's. Please call us to order! 503-659-1234 M-F 8am-4pm Pacific Standard time