This trolley is supplied with the large Optiflex-lite puncture proof wheels. The Optiflex-lite wheels are the ultimate in wheel design. They are ultra light, weigh just 1750 grams, have a wide surface and large diameter for easy use on sand. Never have a flat tyre again. The trolley is supplied with stainless steel/aluminium push button wheel locks which are mounted inside the axle. You will never loose clips anymore. These push button wheel locks can be used on older trollies but can not be used on older wheels with black wheel bushings.