ida34
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It really wasnt clear by just putting up the sizes that you were comparing radials to bias plys. That is a totally different story. Radials run lower than a comparable bias ply. That being said the same size tires from different makers yield different measurements. Bias ply 12.5 compared to 9.00 should be taller if it is the same tire design by the same maker at the same pressure and on the same size rim. I know it has been 18 years since I sold tires but I don't think they have changed that much.