C E Smith Trailer Tires & Wheels Modular Chrome,14 X 6 Rim, 5 4.5 Bolt, 3.19 Hole, St215/75r 14, Radial, 1870 Capacity . Select from a variety of wheel styles including solid or spoked, galvanized, painted or modular chrome. For an even closer match to your tow vehicle s wheels, choose affordable cast aluminum star wheels. Modular Chrome and Aluminum Star wheels come complete with stainless steel hub caps. Tire codes beginning with ST are special trailer tires with stiffer sidewalls to improve trailer stability and reduce sway. Load Range is a rating of the tire s ability to handle horizontal side to side sway stress. Range C is stronger than Range B. For general use and shorter hauls we recommend less costly bias-ply tires. For heavier loads and/or trailers used over long distances, we recommend radial tires. Radial tires wear longer than bias-ply tires, provide a softer ride for your boat with superior high speed stability and have lower rolling resistance than bias-ply tires for imp