Flat Free, Carefree tires are made of polyurethane materials; Polyurethane is non-marking and will not leave black marks on floor
Polyurethane provides high abrasion resistance and thus longer product life; For most situation, flat free (carefree) tires last 4 times as long as that of rubber pneumatic tire
Flat free tire combines the benefits of pneumatic tire and solid tire
No more hustles to continuously pump air into tire month after month
No more agitations over missed delivery due to flat tire