Original tire size for 66 coupe
 

Does anyone know specifically what size tires came on a 66 mustang coupe straight out of the factory?

I couldn't find the exact stock tire size, but i know it was on a 14 inch rim.

I forgot to look it up last night but the closest modern size is the p195 14. It really was a pizza cutter tire. I replaced my p195's with p205 14 which still look small, but much better than the 195's IMO.

Probably was E/78/14

I know, sounds funny by todays terms.

Lou

I believe the original bias ply tires were E70-14 which have a 25.8" diameter. 195-75R14's have a 25.5" diameter. The radial tire with the diameter closest to the original tire diameter is the 215-70R14 with a 25.9" diameter.