Brackets allow use of modern radial brake calipers Brackets have a 108mm caliper mounting hole spread and will work with most radial mount calipers (some shimming and spacing may be required) Tokico calipers from 2004-09 GSX-R 600/750 will work the easiest with brackets. (OEM Suzuki part #'s (right) 59100-29600-999, 59100-41600-999, 59100-41630-999 9 and (left) 59300-59600-999, 59300-41600-999, 59300-41630) Includes shims