Factory size is 855-14 which is 28.1 inches tall. The only broad market tire out there even close to that is 2157514 which is 26.7 inches tall. Kinergy ST (H735) | Passenger Car Tires | Hankook USA Even your brand-new-30-year old tires are at 26.8 inches tall! Coker tire does offer the right size diameter but also very expensive!! One of the main reasons the majority including myself went to broad market 15 inch tires to keep costs down. I run 23570R15 on Magnum 500's..Not "original" but looks period correct. At 28.0 inches tall,bang on regarding O.E diameter.