Skatecycle , Rock Skate board,Skate cycle , New skate board ... to gain and maintain momentum on flat ground. Skatecycle , Rock Skate board,Skate cycle , New skate board,two wheel ... more than 180 and experience problems please contact the company and we should be able to fix the problem ... size crossbars?Currently there is only one size. Skatecycle , Rock Skate board,Skate cycle , New skate board,two wheel ...