List! It is time to get new tires for my GT6 MK1. It presently has 175 70 R13 tires. Is there another size that will fit on the rims that will be a better choice? Any suggestions as to what is a good, reasonably priced tire would be? TIA Alex 1958 TR3 TS33884LO 1968 GT6 KC10303 1976 TR6 CF51981U