Its enlarged 10” rear and 9” front air-filled tires are non-marking, flat-free, and engineered for excellent shock absorption—ensuring a stable and safe ride on any surface. Patented 2-step quick fold folds it down to 39"x22"x17" tool-free, fitting most car trunks; lightweight design (70 lbs total, 61 lbs heaviest part) is easy to transport.