Road Legal?: No Inner Diameter: 35 mm / 1.38 inches Tyre Size: 2.80/2.50-4 Tyre Outer Diameter: 227 mm / 8.94 inches Tyre Ply: 2 Tread Pattern / Type: Tarmac Width: 61 mm / 2.4 inches Tread Depth: 1 mm / 0.04 inches Tread Width: 12 mm / 0.47 inches Tyre Width: 60 mm / 2.36 inches Rim Diameter: 100 mm / 3.94 inches Operating Pressure: 30 P.S.I