It seems like it would be cheaper since it is a maintenance item and the effect on handling would be small.
It would also fix the speedometer reading low. Both larger tires and the 5th gear swap would change the gearing and if you have an auto, your only option is larger tires anyways.
It would also fix the speedometer reading low. Both larger tires and the 5th gear swap would change the gearing and if you have an auto, your only option is larger tires anyways.