Spare Parts Brake Spare Brakes RST Bike Manufacturer of forks for all the MTB disciplines. Founded in 1972, Dah Ken Industrial Co., Ltd. was initially set up to produce parts for cars and motorcycles. In 1990 the company decided to focus on the production of front fork for bicycles. With nearly thirty years of experience and technical expertise in the production of suspension systems, the company has quickly established itself as a leader in the sector.