Rowiz 4 x Off-Road Wheels 12MM Hex Tires Crossing Tyre for RC 1:10 Cars Black Tires Outer Diameter: 65MM / 2.56"; Tires Inner Diameter: 45MM / 1.78" Tires Width: 26MM / 1.02" Wheels Outer Diameter: 52MM / 2.04"; Drive Hex: 12MM / 0.47" Designed for RC 1:10 scale on road Flat Car; 1:16 off road racing car Have Foam inside, Tires and rims are assembled, not glued