Home / Rubber Wheel Rubber Wheel EN 840 Certified. Wheel centre made of Polypropylene, Tread : solid rubber, black colour and plain bearing. Wheel centre made of steel also available. To work with standard 21.5mm steel axle. Print PageView & Print PDF. Provide your email below & we'll send you more product information on Rubber Wheel. Request MoreTechnical drawings & specifications. Product Enquiry Ask us about Rubber Wheel. *All fields are required.