Nimbus 20″ Gremlin Trials Unicycle – Black Features: Saddle: Nimbus Flat (black) Second generation KH design base with front lift handle Seat post: Nimbus 25.4mm x 300mm chromed steel or aluminum with a welded rectangular mounting bracket, 4 hole Seat post clamp: Nimbus (green) double bolt, aluminum Frame: Nimbus II 20″ steel with 42mm machined maincap bearing housings Hub/axle: Nimbus ISIS (black) 36H, hardened CrMo splindle,100 mm center bearing to center bearing Spokes: 14G. stainless black (167mm in length for 3X) with brass silver nipples Rim: Nimbus Dominator2, 19″ trials (green) 36H, 42mm wide, aluminum doublewall, reinforced eyelets Rim strip: Rubber Tube size: 20″ x 2.1″ Tire: Nimbus Cyko Lite 19″ x 2.5″. This is a specific tire for this rim. A regular 20″ tire cannot fit this rim. Crank arms: Nimbus Venture2 (black) 125mm, ISIS splined, aluminum Pedals: Nimbus Venture, reinforced plastic body with steel removable pins, backing plate for added durability and CrMo axle with 9/16 threads Bearings: 22mm x 42mm Approx. cycle weight: 12 lbs.