Radial ply tyre. Cross-ply tyres. How a tyre is made. Tyre markings. Directional tyres. Asymetric tyre. Valve. Tyre wear. Wheel Balancing. Tread depth gauge. Tyre wear bars. Pressure gauge. Tyre cages. Tyre explosion. Steel wheels. Alloy wheels. Wire spoke rim. Split rim wheels. Space saver.