株式会社ヨシガイ, Kabushiki kaisha Yoshigai), known by its brand name Dia-Compe, is a Japanese manufacturer of bicycle components headquartered in Kadoma of the Ōsaka Prefecture.
Dia-Compe have specialised in caliper and cantilever brakes, headsets, handlebar stems, suspension forks and other bicycle components.
International subsidiaries of the Dia-Compe brand were established in the United States in 1975 and in the Republic of China (Taiwan) in 1987.
[2] In 1990 John Rader, the designer of the Aheadset system (US Patent 5095770 A [3]), gave exclusive licensing to Dia-Compe for the product.
[6] Other KK Yoshigai brand names for wheel components are Diatech and Gran Compe.