Yiguo 4pcs RC 1:8 Scale Off Road Car Buggy RC Tires Tyre and Wheels for Redcat HSP HPI Black Suitable for RC 1:8 Off Road Car. Tyres are made of rubber with sponge inside, wheel rims are made of plastic, perfect replacement 112mm OD Black High Grip Rubber Tyre. Material: Rubber/Plastic Notes: The tire is not glued on rim, you can split it. If you want higher performance, please glue them well before using them