raio

A spoke is one of some number of rods radiating from the center of a wheel (the hub where the axle connects), connecting the hub with the round traction surface. thumb|right|A spoked wheel on display at the National Museum of Iran, in [[Tehran. The wheel is dated to the late 2nd millennium BCE and was excavated at Choqa Zanbil.]] thumb|right|The remains of a pair of cart wheels with metal axle assembly. thumb|right|An ox-wagon in [[Aliwal North, South Africa. Note the three missing spokes and the metal tire.]] right|thumb|Wooden spoke wheel with metal rim from antique truck on display in Under