RADIAL CALIPERS EXPLAINED
Radial brake calipers were first developed by Brembo for use on single seat race cars in 1982 and were first tested on a 500GP bike way back in 1992. However, the idea didn’t catch on in the two-wheeled world, and the first GP team to use radial brakes for a full season were Aprilia with Valentino Rossi, Tetsuya Harada and Loris Capirossi on their RS250 GP bikes in 1998. So effective was the system, that for 1999 nearly the whole of the 500GP grid had dumped conventional calipers and started using radial ones, a trend that has continued to this day. They are now on most road bikes – from budget scooters right through to the most expensive superbikes. The first standard production road bike to use a radial calipers was Aprilia’s 2002 RSV 1000 R. They improve sharpness and feel as the caliper mounting bolts run perpendicular (and not parallel) to the wheel axle.
Radial calipers are now ubiquitous