The Heavy Duty Manufacturers Association (HDMA) was established in 1983 to meet heavy duty product manufacturers’ need for a national association dedicated to their specific interests. HDMA is the only organization in the heavy duty sector today dedicated exclusively to heavy duty manufacturers. Everything HDMA does - from market research to government representation - is driven solely by the best interests of manufacturers.

HDMA membership is made up of companies participating in the classes 4-8 medium and heavy truck OE and aftermarket parts manufacturing industry. These members represent every segment of the heavy duty market - from components, service and repair equipment and tires to chemicals, lighting and accessories.