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Discussion Starter #1
I'd like to upgrade to bigger tires on my stock 16 Trailhawk which came with 245/65/17's.
These are 29.5" high.
Does anyone know what the max size upgrade we could go with?
Would 265/70/17's fit which would be 31.6" high?
Thanks
Charlie
 

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Max is probably 265/65r17 or 245/70r17

of course there is always trimming.

Not all tires are exactly the same either.
Despite the numbers on their sidewall they can vary.
 

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Discussion Starter #3
Max is probably 265/65r17 or 245/70r17

of course there is always trimming.

Not all tires are exactly the same either.
Despite the numbers on their sidewall they can vary.
So you think only about an inch? I haven't measured how much clearance I have at full lock but it sure looks like a lot more than that to eyeball it. I was able to increase about 2" on my Durango with no rub at full lock. I guess I could look at spacers but I don't really want my tires sticking out too far past the fender.
Are you running a larger size yourself?
 

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I ran the 245/70 17 Duratracs without lift and they just barely scrubbed the back of the front wheel well at 3/4 lock. Just enough to clean mud of the liners. 265/65 will do the same, though spacers will cause them both to rub more.

Add a lift and no change as that spot does not alter with the lift.

The only way to go larger is to start trimming the liner and the pinch welds underneath.

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I'm running KO2s in 245/70/17 with no lift. No rubbing at all.

My only possible run issue is when I floor it during a turn. The front right tire rubs the lower spring collar (if that's even the right term for it, I'm a novice), but it's a rare occurrence.


It's the small black spot near bottom center.


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I saw a picture of one with 265/65R17 and it doesn't look right to my eye: more like a big hot wheels!
 

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Will a 255/65R17 fit in the spare tire compartment?
Should, they're only 1/2" taller and 10mm wider tread.
 
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Should, they're only 1/2" taller and 10mm wider tread.
Na they won't. The 245 70 has the wriggled around for the lid to close. The 255 would have the lid lifted slightly.

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I'm running KO2s in 245/70/17 with no lift. No rubbing at all.

My only possible run issue is when I floor it during a turn. The front right tire rubs the lower spring collar (if that's even the right term for it, I'm a novice), but it's a rare occurrence.


It's the small black spot near bottom center.


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That should not be the tyre rubbing. The strut and spring base move up and down and turn with the wheel so the distance will never change. More likely a rock or mud or stick or something in the tread hit it.

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Na they won't. The 245 70 has the wriggled around for the lid to close. The 255 would have the lid lifted slightly.

Sent via Tapatalk from a small keyboard on my phone with fat thumbs and no glasses...
The 245/70 is also another 1/2" taller again and probably doesn't sit flat in the well causing it to push the lid up.
Pretty sure there was a thread here that said the 255/45 fit.
And also it will probably depend on what tire you are running. A BFG KO2 or a Duratrac have fairly aggressive sidewalls that protrude which could cause interference, My Cooper X/T4's do not and would probably have no issue.
 

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Discussion Starter #14
Thanks everyone for the info, it's very helpful. Since I have no desire to start trimming on my new jeep I think I'll most likely go with the 265/65/17's.
 

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That should not be the tyre rubbing. The strut and spring base move up and down and turn with the wheel so the distance will never change. More likely a rock or mud or stick or something in the tread hit it.

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Awesome, good to know. Thanks for the insight!


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When people say they have no rubbing issues are they checking the tire at full suspension compression?

Also, does this AWD/4WD system require that all tires be the same diameter (i.e. the spare has to match the other tires)?
 

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Didn't you say in another thread that you had to air down to 5psi for that to work? Probably a good piece of information to have in case someone expects to do that without some sort of on board air.
Yes I did, and I do keep a small compressor in there with it. Along with a plug kit and tools.
 

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When people say they have no rubbing issues are they checking the tire at full suspension compression?

Also, does this AWD/4WD system require that all tires be the same diameter (i.e. the spare has to match the other tires)?
I think I saw in a thread somewhere that the duratrac 245/70/17 will rub ever so slightly on the TH with extreme off Road compression, but that it's not a problem.

For me, it's extremely rare I'd be at that compression. Also, I wonder if airing down a bit prevents it which it seems likely you'd do for that kind of crawling, right?


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