[Large Wheel, Climbing Hotel Stairs Very Easy, No Wear Off The Backpack] This wheel, which we have registered an American patent, is unique. Rolling Backpack Have 18CM(7inch) Wider large Wheel, steady, heavy loading, saving labour and time, easy thru airplane aisles and stair, do not worry the wheels turned sideways, also do not worry wear off the backpack [Backpack With Wheels Have Better Handle] YH & GS Carry On Backpack have ABS Material Handle, better with time, no more worry about handle won't close