I've run several types of 4 l/s brakes, mostly on race bikes but some road bikes.......This includes several of Vincent Speet's brakes, Suzuki GT 750, Ceriani 230 mm, Yamaha 260 mm TZ, Fontana 230 and 250 mm magnesium........They all work very well, the larger ones way, way better than any Vincent brakes........Nice to use them if you can........Some are rather heavy, so increasing the unsprung weight, but the brake performance is worth it.