This fork crown provides a best fit with Reynolds 531 “Imperial Oval” fork blades. The fit is not optimized for the Kaisei blades, and some work may be required to make them fit.
The Imperial Oval fork blade is narrower at the top, so it provides tire clearance without a bulky appearance. It also is longer (front-to-back), so it resists the forces of braking better.
Made by Takahashi.