About Us

Square Wheel Industries, Inc. is a privately held, Pennsylvania based corporation, providing semi-trailer and RV trailer light and brake testing equipment to trailer manufacturers, trailer rental firms, fleet managers, and trailer repair shops throughout the United States and Canada. In 2011, Square Wheel Industries became a Division of Reading Electric.

Founded almost 25 years ago by The Butchko family with the introduction of Scanner, Square Wheel Industries has grown significantly to serve a wide customer base with cutting edge development of a variety of Trailer Testers, Socket Testers, Adapters and trailer related Parts & Accessories. Our trailer tester designs have been continuously refined through user feedback to ensure simplicity in use, extreme durability, and cost effective versatile solutions.

We are proud to say that many of our products have been in use for more than twenty years, helping trailer manufacturers, fleet managers, trailer repair shops, rental yards, service and maintenance companies to improve efficiency and driving safety.

Square Wheel Industries is the premier manufacturer of Trailer Tester equipment, designed for truck and trailer mechanics, trailer inspection stations, trailer manufacturers, and trailer rental companies.

Our facility is located at 80 Witman Road, Reading, Pennsylvania 19605.