The atr keeps going even when the smooth pavement doesnt this wheel is built on a robust wide profile carbon fiber rim to fit bigger all terrain tires so you can explore back roads with great traction and comfort the 24 steel spokes also add to the smooth ride quality and with center lock disc rotor capability you will enjoy positive braking even when that dirt road turns to mud look no further the atr is all terrain road specifications weight set 1535g width external 29 mm