Ehnes Co., Inc. 888-200-6695 P. O. Box 1357 , Lebanon, MO 65536 Introducing the best solution for safe maintenance on 18-wheelers and flat bed trailers as well as 1 1/2 ton, 2 ton, and some medium-duty trucks... The Universal Big Truck Tire Step (fits tire sizes 10 to 11 1/2 wide) Patent Pending and US Patent # D448335 ...