wheel chock Made heavy duty plastic wheel chock are available in a wide range of colours thus allowing for size colour coding. Truck Wheel chocks1. Available in a wide range of colors thus allowing for size color coding;2.Designed to fit a wide range of tyre sizes and are rated as inch dia. of wheels. An indication of size type: OZCH055=55 inch dia.wheel OZCH105=105 inch dia. wheel3.Always use an ...