Originally Posted by
syfi
Think again. The cost of dismounting the 2 rears and re-installing on the opposite side rim, along with re-balance was under $100. Got 12K more miles on them. The G-Maxs have a directional mirror image tread that allows for an easy swap. 
I think the point we were trying to make, sir, is that: if you have directional tires, you must add the cost of remounting and rebalancing 4 tires to eke out another 8-12 months of use. $80-$100.
If you have the OEM choice, Conti's or similar all-season UHP's, which are non-directional, you just move the tires.
Free if you do it yourself, $20 if you take it to someone with a lift.