Mert Lawwill (Born September 25, 1940) is an American professional motorcycle racer, race team owner and mountain bike designer. He won the 1969 AMA Grand National Championship and, was one of the top competitors on the AMA national racing circuit during 1960s and 1970s. After his motorcycle racing career, Lawwill became one of the top motorcycle racing frame designers and builders. Lawwill then used his experience as a motorcycle frame builder to become an innovative mountain bike designer, developing one of the first bicycle suspensions. He also developed prosthetic limbs for amputees. Lawwill was inducted in the Mountain Bike Hall of Fame in 1997 and the Motorcycle Hall of Fame in 1998.