Who's running the same size tires front and rear
I run 5 of the same size in both bias ply and radials.
225/70/14 redline BGF tires, stock wheels and a matching spare.
E70-14 redline firestones, stock wheels and a matching spare.
It just makes life easier because my old hot rod runs big and smalls and my spare is a compromise for both front and rears.
Cliff Ramsdell