Shimano mtb brake inner outer cable pre cut when the time comes to overhaul the cabling of your brakes to improve performance the shimano steel inner brake cable that is suitable for both front and rear brakes when using mountain bike brake levers will do this perfectly features inner steel inner wire with anti corrosion treatment inner suitable for front or rear brakes outer lined with a polymer sheath to assist with the smooth operation of the inner wire outer for use with 16mm dia