Whitewall Radial Tires | Coker White Walls Coker Classic Whitewall Radial tires, introduced in 1995, are the first modern radial construction wide whitewalls. DOT and ECE (European Union) approved, with an all-season tread design and backed by our life of the tread warranty. Coker white walls widths may vary slightly, dependent on rim coverage. Please note that dimensions listed tread width, section width and overall diameter are non-scientific and based on an inflated tire, mounted on a wheel. Dimensions may vary due to rim width and inflation pressure.