Sealed cartridge bearings, 40mm OD x 17mm ID x 12mm. Plastic 9/16″ pedals. Steel rim, 36H x 14G, chrome polished. 3/8″ hub axle. Stainless steel spokes with brass nipples. Kenda Kontact tire, 24″ x 2.125, black wall. Unicycle weighs approximately 13 lbs.