Quote Originally Posted by k_leos View Post

If I just put one new Yokohama tire with same spec of 225/60 R17, with full thread thickness. What would happen to the 3 other tires. Would their treads get thin faster or would it involves only the new tire? Any animation of the effects?
i once purchased one new tyre, and mixed it with the three older ones.
i noted no significant difference in car behavior or performance.
did one tyre wear faster than the rest?
i wouldn't know. kasi, it was still several years afterward, that the older tyres became bald enough for replacement. by that time, i couldn't care less anymore.