What tire size will fit the spare tire space? - Jeep Commander Forums: Jeep Commander Forum
Wheels / Tires This section contains discussion about wheels and tires for your Jeep Commander.

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post #1 of 9 (permalink) Old 09-17-2018, 05:35 AM Thread Starter
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What tire size will fit the spare tire space?

Hello, I am going to order new tires for my Commander and, after reading numerous posts, I decided on 245/75 R17 as this is the largest tire I can fit with a 2" OME HD lift and without any mods or spacers.

However, I kind of forgot about the spare tire. Will this size fit? I read some posts where someone said that 245/70 R17 (or was it 255/70 R17?) fits, but I could not find anything about 245/75 R17.
Is there anyone having this tire on a stock 17" Commander wheel in the spare tire space?
Thanks.
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post #2 of 9 (permalink) Old 09-17-2018, 06:27 AM
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Quote:
Originally Posted by zoom View Post
Hello, I am going to order new tires for my Commander and, after reading numerous posts, I decided on 245/75 R17 as this is the largest tire I can fit with a 2" OME HD lift and without any mods or spacers.

However, I kind of forgot about the spare tire. Will this size fit? I read some posts where someone said that 245/70 R17 (or was it 255/70 R17?) fits, but I could not find anything about 245/75 R17.
Is there anyone having this tire on a stock 17" Commander wheel in the spare tire space?
Thanks.
You can fit up to a 265/70/17 in the spare tire area which is about 31.6 inches in diameter.


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post #3 of 9 (permalink) Old 09-17-2018, 09:07 AM
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I have a brand new stock Wrangler Sahara (255/70/r18) in there right now with no problem. Doesnt hit the rear track bar. However, I do not have a factory hitch. I guess if you have the hitch, the bolts can prevent you fitting a tire of that size.

Stay heady my friends.
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post #4 of 9 (permalink) Old 09-17-2018, 11:17 AM Thread Starter
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Okay, since 245/75 R17 and 265/70 R17 tires are almost identical (31.47 and 31.61 inches diameter), it should work.
I do however have a factory hitch, so I will measure the available space when I get to it just to be on the safe side.
Thanks.
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post #5 of 9 (permalink) Old 09-17-2018, 12:16 PM
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Commonly, when people have the factory hitch they have to make modifications to get a larger tire to fit. A 245/70 barely fits under mine with the factory hitch, so a 245/75 might be a tough fit when fully inflated. If you deflate the tire and use a ratchet strap to compress it, you can get a pretty large tire underneath, but you'll need to have a way to inflate it.

As far as modifying the hitch goes, there are two variants. The first is to just trim down the existing bolts; there's a thread here with good pictures of the process.

The other option is to use carriage bolts and point them out away from the tire, as seen here. This will get you around half an inch of extra clearance over just trimming the existing bolts, but you need to make sure to source grade 8 carriage bolts for this. With this mod, you may be able to fit up to a 255/75.
luckyse7ens and drm4633 like this.

2006 XK Limited, Hemi, QDII
245/70R17 General Grabber AT2s
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post #6 of 9 (permalink) Old 09-17-2018, 03:54 PM
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Quote:
Originally Posted by consumedbywater View Post
Commonly, when people have the factory hitch they have to make modifications to get a larger tire to fit. A 245/70 barely fits under mine with the factory hitch, so a 245/75 might be a tough fit when fully inflated. If you deflate the tire and use a ratchet strap to compress it, you can get a pretty large tire underneath, but you'll need to have a way to inflate it.

As far as modifying the hitch goes, there are two variants. The first is to just trim down the existing bolts; there's a thread here with good pictures of the process.

The other option is to use carriage bolts and point them out away from the tire, as seen here. This will get you around half an inch of extra clearance over just trimming the existing bolts, but you need to make sure to source grade 8 carriage bolts for this. With this mod, you may be able to fit up to a 255/75.

Nailed it. I came here intending to link this exact information.

I have a 255-70r18 which is a 32" tire in my spare location.
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post #7 of 9 (permalink) Old 09-19-2018, 11:03 AM Thread Starter
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Join Date: Aug 2015
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Current Mileage: ~81 000 miles (130 000 km)
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All right, thanks for all the information. That modification topic is very helpful. Now I know exactly what to look for. In fact, it made me rethink my choice of tires and it is very possible I will go for 245/70 instead of 245/75 as it will save a lot of work and might possibly be cheaper. There is also quite a bit more tires to choose from in 245/70 dimension.

I will measure the available space this weekend just to double-check everything. However, 245/70 R17 now sounds like the right choice for me.
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post #8 of 9 (permalink) Old 09-22-2018, 02:18 PM
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I have the factory hitch and 245/75/17 on the spare. Goes in and out without issue.
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post #9 of 9 (permalink) Old 10-02-2018, 03:51 PM Thread Starter
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Join Date: Aug 2015
Location: Slovakia, Europe
Own a Commander?: Yes
Model year: 2007
Trim Package: Overland
Power-Train: 5.7L V-8 Hemi
4WD
If 4WD - system: QD-II
Current Mileage: ~81 000 miles (130 000 km)
Posts: 15
All right, thanks for the info. I checked available space and it seems everything is as you guys described (who would have thought that).

I took a photo of the available space with stock 245/65 R17 wheel. It is not very clear, but there is about two fingers-wide space. So 245/70 R17 will fit nicely and 245/75 R17 should fit too, according to Flex. That is all I needed to confirm and see with my own eyes. Better safe than sorry.

Thanks for all the input. I can now proceed, order some tires and finally get this OME lift installed.
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