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Dia Compe ®
The leading Japanese brake supplier before Shimano acquired a near monopoly on the Japanese parts business. Dia Compe used to have a working relationship with Sun Tour, and made the brakes labeled "Sun Tour." Dia Compe components have a well-deserved reputation for quality.
Dia Compe first made a major impression on the bicycle industry in the late '60's, by inventing extension levers for drop-bar brakes. At that time, Weinmann was the leading brake manufacturer. Dia Compe's extension levers were so popular that Weinmann entered into a licensing agreement with Dia Compe, allowing Dia Compe to copy Weinmann's brakes in return for letting Weinmann copy Dia Compe's extensions.
More recently, Dia Compe has revolutionized the design of headsets, with its "AheadSet" threadless headsets.
