I have recently got my 72 Twin Cam running. I have added new seat belts and have had the Spyder front end aligned. I am interested in purchasing new tires. My existing tires are front 175/70 HR 13 Stahflex 3011 and the rears are 185/70 HR 13 Semperit. My existing rims are Cosmic. Any help would be appreciated. Thanks! Mark