Flat-free solid rubber wheels can withstand heavier loads than pneumatic, semi-pneumatic, and they provide more shock absorption than semi-pneumatic wheels. They absorb shock and vibration for a cushioned ride and will not go flat if punctured, making them suitable for rolling over rough or uneven terrain in areas that may contain nails, metal shavings, rocks, or other sharp debris. The wheels have a hard rubber core and are heavier than pneumatic, semi-pneumatic, and flat-free polyurethane foam wheels.
