Triangle Suspension Systems, Inc. makes undercarriage products for heavy-, medium- and light-duty trucks and trailers, including steel leaf springs manufactured in the United States. Founded in 1919, the company traces its roots to Pittsburgh’s Golden Triangle and moved its operations to DuBois, Pennsylvania, in 1927; it reports that its products are backed by ISO-registered facilities and distributed through a nationwide network.
ISO 9001:2015
Registration
Ground ForceGround Force manufactures tuned-performance suspension systems for light trucks, SUVs, crossovers, and performance muscle cars. The company says it has nearly three decades of experience, with its systems and components made at its Mount Braddock, Pennsylvania facility using materials manufactured in the USA. Its engineers work alongside original-equipment automotive manufacturers on suspension development.MOUNT BRADDOCK, PA
Point Spring & Driveshaft CoPoint Spring & Driveshaft Co. is a heavy-duty truck parts distributor and service provider that has served the industry since 1926. The company’s history traces its Pittsburgh roots to a spring business, and driveshaft repair and driveline-component distribution became specialties as it expanded across Pennsylvania, Ohio, and West Virginia. Its Brake Lining Supply operation produces remanufactured brake shoes, while its service shops also fabricate and repair truck components.FAIRMONT, WV
Diamond Wire Spring CompanyFounded in Pittsburgh in 1939, Diamond Wire Spring Company designs and manufactures industrial custom and stock springs and wire forms. Still independent and third-generation family-owned, the American manufacturer serves customers from three ISO 9001:2015-certified plants and a stock warehouse, with thousands of springs available for same-day shipment. Its long history includes specialized work for demanding fields such as rail transportation and medical equipment.GLENSHAW, PA
Dayton PartsFounded in 1922 as Harrisburg Stanley Spring Works, Dayton Parts manufactures and supplies replacement drivetrain and undercarriage components for commercial vehicles from its Pennsylvania headquarters. Its history began with leaf springs, and the company now serves spring shops, distributors, dealers and fleets across North America through manufacturing and distribution facilities in the United States and Canada. Dayton Parts became part of Dorman in 2021.SHIREMANSTOWN, PA