All our forklift tipping skips come with pre-drilled castor plates, which means castors can be simply bolted as a replacement or as a retro-fitted to your skip without any on-site welding required. We offer four different types of skip wheels (aka Tipping Skip Castors) options; Standard Skip Castors (100mm diameter nylon, 2 fixed, 2 unbraked swivel) Braked Skip Castors (100mm diameter nylon, 2 fixed, 2 braked swivel) Heavy Duty Skip Castors (100mm diameter cast iron, 2 fixed, 2 unbraked swivel) Heavy Duty Braked Skip Castors (100mm diameter cast iron, 2 fixed, 2 braked swivel) Castors are sold as a set of four (4 wheels in total)