Rowiz 4x Green RC Car Flat Tires Tyre and Wheels for HPI On Road Touring Car Designed for RC 1:10 scale on road Flat Car; 1:16 off road racing car 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" Material: Plastic + Soft Rubber; Have foam inserted