You are bidding on a set of fork springs for a YAMAHA TZ125 Factory Road Racer. It is an .55 kg/mm. YAMAHA OEM spring rates are only offered in one rate so those of us that are weighing under and over can benefit with a softer or stiffer rate fork spring. We also have shock and fork springs in lighter and heavier rates for all years of the TZ's. Can supply any rate you request on this auction. Good luck at the track!