Since 1919, the TRIANGLE name has been synonymous with steel leaf springs. Originally the company was located in the “Golden Triangle” section of Pittsburgh, and in 1927 the base of TRIANGLE’s operations moved to DuBois, PA. TRIANGLE’s market share increased through steady organic growth thru the years. A series of strategic acquisitions put TRIANGLE firmly on the road to becoming a leader in undercarriage products for heavy, medium & light duty trucks and trailers in the North American market.