Mini 4WD Tyre Diameter and Compound Tuning

Tyres set both the car's effective gearing and its behaviour over corners and 3D sections. Large diameter helps top speed; smaller and low-profile tyres lower the centre of gravity and usually make direction changes calmer.

Compound is a handling decision

Grip is not always speed. Low-friction tyres can reduce rolling resistance on courses where surviving jumps and banks matters more than maximum corner grip. Choose a tyre for the specific surface and section sequence, not a reputation.

True the basics

Check all four tyres for roundness and equal fitment. A tyre that is out of round can look like a mysterious chassis or motor problem. Change diameter or compound separately from gear ratio so the result stays understandable.