Our new Micro Lite Wheels are available in 3 sizes: 1-1/2"" (38mm), 2"" (51mm) and 2-1/2"" (64mm). They feature a one piece design, with polished spokes and flat black wheel (no O-Rings to come off rim). Comes complete with 2 sets of wheel retainers, a wide axle hub for a true running wheel. Perfect for indoor and park flyers. 1 pair/pkg."