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Hi all, first post here. I have a new 2019 Trailhawk, and as you know they come with 215/65R17 tires. I bought some Falken 225/65/17 tires and my math shows they should fit, but I'm hearing from tire place that they won't. We're talking a little under half an inch wider (8.5" to 8.9") and a half inch more in diameter (28" to 28.5"). Am I missing something? Input appreciated.
 

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To the best of my knowledge, those should fit, but its going to be fairly close and some tire shops are finicky, especially the big-chain ones due to legal issues.

I have some pics partway down this thread here where we were talking about clearance for tire chains: https://www.myjeepcompass.com/forums/2nd-gen-jeep-compass-forum-general-discussion/42085-tire-chains-2018-trailhawk.html

The clearance for the bottom of the spring cups on the strut towers is probably your biggest concern. When you are looking at my pics from that thread bear in mind that those are photos of my 225/55R18 tires (~27.7" x 8.9) and most of the original tread is worn off. Your tires are going to be about an inch taller and the same width, so you can see why it might be close.

I'm not sure if/how the backspacing varies between the 18 inch stock rims and the 17 inch stock rims. Its probably the same?

If clearance really truly is an issue, to keep your stock rims Spacers would pretty much take care of the issue, but of course that is sort of a taboo topic. You wouldn't need much, either 3/4" or 1" would get you good and clear of the strut towers and the rest of the fenders should be no problem at 28.5 inches. New rims with different backspacing could have the same effect and arguably be safer, just much more expensive. Something to consider, though. After all, I paid something like $750 for a fellow forum member's 17" stock rims and tires (without TPMS) so its not like you hypothetically can't possibly break even or get most of the money back on getting new rims with enough backspacing to minimize clearance issues. Just more work and some upfront cost and all that. I'm just trying to give you ideas.

Obviously a lift will not help in this case, as that only spaces the top of the struts from the body and your clearance to the bottom of the springs will be the same.

Perhaps a different tire shop would be willing to mount just one of the new tires and bolt it up to find out how close it really is. They will want to try it in the front, AFAIK the strut clearance is not so much an issue in the back. You might end up with like 1/4" of space between the bottom of the spring cup and the tire and that space won't change, so like technically it would work but understandably a tire shop is not going to be thrilled about it from their liability standpoint. Like we talked about in the thread I linked, if you go and try to throw on some tire chains they are gonna get caught on the spring mount and tear something apart! And again, spacers could cure this, but...

Let us know how it works out, send some pics like the ones I took to show us how close things do or don't end up being when its all said and done. Good luck.
 

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They will fit just fine on the stock rims no modifications of any sort will be needed.
 
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