Maintaining 4wd 'balance' after tyre change

[murphy1244]

I think the rate was 5%

 

[RG1]

The best way to know for sure would be to A- check the rolling circumference of each type of tire when they are both mounted and inflated to the same air pressure (preferable) or B- both are not mounted on a rim at all. Having the same numbers on the sidewall doesn't necessarily mean they will provide the same RC. I have owned several sets of tires now that are marked exactly the same numerically, yet are clearly different in height when both are inflated to the same pressure.

 

[Zebrafive]

Manufacturer wants the front tires covering a slightly more distance than the rears. This is called lead. You want 1-5% lead, so there is tolerance for tire wear. With the fronts Leading (pulling) it steers better than when the fronts are lagging (being pushed).

 

[skyhook]

I would assume "if' you added 4 inches in height on the rear, you would need to also do it to the front.
Whatever is added or removed from the rear, has to be done to the front.
I would also assume, a difference of an inch would not hurt. IMO