Two years later Turner and his wife Christi were manufacturing suspension forks in their garage with parts bought from Simons Inc, who later partnered Turner when Steve and his wife, Deborah, mortgaged their home to buy out Dia-Compe and move manufacturing to Mt. Turner had in 1987, with the help of Keith Bontrager, presented a full bike with front and rear suspension at the bicycle industry trade show in Long Beach. In 1989 or 1990, Turner approached Simons for help designing a suspension fork for mountain bikes. Paul began developing the first bicycle suspension fork. In the late 1980s Paul began riding mountain bikes and with his motorcycle experience longed for suspension. He had two patents on suspension forks, one which, for upside down forks, he licensed to motorcycle and suspension manufacturers. This led to his own fork design and manufacture. developing pneumatic upgrade kits for suspension forks. He then established his own company Dynamic Enterprises which became Simons Inc. He developed heat sinks for Koni shock absorbers to lower oil temperatures and then in 1974 he designed a shock absorber for the company that became Fox Racing Shox. Simons is a former motocross rider in his teens and early twenties and entrepreneur. This put him in contact with designers of suspension systems for motorcycles and other motocross industry people. He later worked for the Honda Motor Company as factory mechanic for their professional motocross team. In 1977, at the age of 18, he established a company that sold motorcycle components. It moved to California four years later when Steve and Deborah Simons bought out Dia Compe. RockShox was founded by Paul Turner in 1989 in Asheville, North Carolina, USA.