Tires

Anytime you want to change tire size, I would suggest going to http://www.tirerack.com
and checking the tire dimensions first. Off the top of my mind, I would say that your tire choice should be fine but remember that the 70's will be a little lower (smaller diameter) , but wider, so the wheel wells will seem even LESS filled-up with the 70's.
I used to do the "75-series" to "70-series" swap on ALL my cars but I also made sure to "fill them wheel wells" by staying with the same (or larger) first number. (example: stay with the 235's and don't drop to a 225)

Mackenzie said:

Thanks guys. Just so I am clear...if we drop from 235/75/15 to 235/70/15 this will work fine...in otherwords, will it effect the ride, safety or tread life.

Thanks,
Bob

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That depends more on the tire type, and manufacturer than the size (especially only changing just one size).
The size change will provide you with a slightly lower profile, but slightly wider tire. Generally this slight size change will not give you a problem. All things being equal, the ride MAY end up being slightly firmer with the added benefit of better handling.

HotRodSaint said:

If it's a deal, go ahead and do it.

And here's two great tire sizing sites to help with these questions.

http://amsoft.ru/tiresize/index.html

http://www.geocities.com/xtremephoenix/tire.htm

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Nice sites :thumbsup: