The Leland Brake brand's heritage dates back to 1943. Originally under private ownership, the product line was acquired by Maremont Corporation in the late 1950's and continued operation until purchased by T&N Industries of Manchester, UK in 1977.

Once acquired by T&N, Leland became one of the brands sold in the USA under the Nuturn Corporation entity. The TMR Spring Brake product line originated in Southgate, CA and was acquired by Nuturn Corporation in 1985. The Nuturn Corporation changed its name to Ferrodo America in the years following.

Triangle Suspension Systems purchased the Leland Brake & TMR Spring Brake brands from Ferrodo America in December, 1997 and moved to DuBois, PA in 2001. The brake product was offered as a product to the spring and suspension market.

In 2006, Triangle segmented the brand into an independent division; Leland Brake & Wheel Parts. This business will focus on the brake foundation parts, attaching wheel end parts, and spring brakes for the Medium and Heavy Duty trucking market.