Hello all,

I have a kinda dumb question. My envoy has 245/65/17 on it, can i replace them with 245/70/17 ties?

Thanks all

First off, welcome to the forum. I can't see why you wouldn't be able to. You are only increasing the width of the tire by about 1/2", so interference shouldn't be a problem. It may affect your speedo a bit, but I can't be sure. Hopefully another member can help you with this. I replaced my tires with the OEM size, so I can't speak from experience.

I don't think that a change to the size you are asking about will hurt anything, just don't mix and match replace all with one size or the other, especially on a 4 wheel drive. Other than that shouldn't be a problem. Just time your speed through a mile to see if your speedo has changed. 1 minute is 60 miles per hour thru the mile. 55 sec is 65miles per and 1 minute 5 seconds is 55...

Yeah! Definitely you can do that. And you can do it yourself also. There is no need to go to any dealer for this purpose.

Hey Carl, you received correct info those numbers designate load range, top speed, and type , in this case its a mud and snow designed tread, which was tested to up to 130mph for an hour under controlled test environment. The higher the speed rating the higher the speed the tire was actually subjected to . The Z rating as used on supercars has the best and usually most expensive designation. Hope this helps...
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