Alex Toys Y303 48H Alloy 14mm FW Nutted Rear Wheel, 20x1.75-Inch, Black/Black Alex 7X style rim, Alloy, Flip Flop Hub Wheel Build: 14g UCP spokes, 3X lacing, 1/2" Brass nipples Hub: SBS Alloy, 1 speed Flip Flop, Looseball bearings, 11mm OLD, 14mm Axle, Black Rim: Alex Y33, 2 x 1.75", 3mm wide Ground Sidewall Single Wall Clincher, 48h, SV hole, Black, w/o Rim Strip