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Unread 01-15-2015, 02:48 PM   #1
PMHSLight
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Spare Tire - 18" Rims

I have a 2014 Jeep Grand Cherokee with Off Road Adventure Package which gives me a Full size STEEL spare (Not the exact same rim that I have on the Jeep). Does anyone know if I were to go out and buy another Factory Stock Rim (Limited 18" Rim) if It would fit in the spare tire compartment once mounted on a standard Stock Tire (Identical to what is on the Jeep now)? Basically, if I were to get a flat, Id like to be able to put the identical tire and wheel on similar to how a wrangler carries the exact same tire and rim as a spare. Would the tire compartment cover close all the way and be flush?
Anyone tried this?

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Unread 01-16-2015, 09:56 AM   #2
Steiner84
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Short answer, no.

Since you have the 18's, I assume you are running stock 265/60R18 right now. I just upgraded mine to 275/65R18 and thus, changed out the spare so it has the same diameter. So the spare I have in my compartment right now is a 255/70R18, thinner than your stockers. The lid on my compartment rests on the tire; it doesn't fully close. The bottom of the lid sits flush with the top of the cargo area. So it doesn't fall into the recess, but there's also no visible gap into the compartment.
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Unread 01-16-2015, 10:44 AM   #3
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There are also some discussion in the wheel and tire sticky thread about which tire sizes fit in the spare compartment.
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Unread 01-16-2015, 10:53 AM   #4
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In addition to the above, the full size spare is the same diameter as the tires on your four corners, but it's "thinner" so it fits under the cargo cover. And just so you know, that same spare is used on vehicles that have 20" wheels...again, the tire diameter is the same.
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Unread 01-17-2015, 07:48 PM   #5
Gunny7
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Tire dia is important with some of these electrical stability and locking rear ends.
I wouldnt worry about the looks if you get a flat.
I saw a Corvette going down the road with the 4 in wide spare.
But it was going. Thats the important thing.
Those little spares are built to aircraft standards by the way.
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Unread 01-17-2015, 07:56 PM   #6
jim_in_PA
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Gunny7, JGC requires all four tires to be the same diameter more or less for the reason you state...the drive train. Width is no matter so "donuts" work for the JGC as long as they are full diameter. For vehicles with the towing package, the "full size" spare is required for weight handling so if you have to swap in the spare, your load is properly supported. Can't use a "donut" for that situation.
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Unread 01-17-2015, 10:34 PM   #7
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Quote:
Originally Posted by PMHSLight View Post
I have a 2014 Jeep Grand Cherokee with Off Road Adventure Package which gives me a Full size STEEL spare (Not the exact same rim that I have on the Jeep). Does anyone know if I were to go out and buy another Factory Stock Rim (Limited 18" Rim) if It would fit in the spare tire compartment once mounted on a standard Stock Tire (Identical to what is on the Jeep now)? Basically, if I were to get a flat, Id like to be able to put the identical tire and wheel on similar to how a wrangler carries the exact same tire and rim as a spare. Would the tire compartment cover close all the way and be flush?
Anyone tried this?
Imhave done this and yes the REAL full size spare is a little wider then the so called full time steel size spare.
But the cover still works.
Just don't fit a wider tyre then standard
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Unread 01-22-2015, 08:41 PM   #8
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I have an 18'" sahara take off in mine, I had to trim the foam on the jack holder and it is a tight fit that will not allow you to use the trays but it works, I still have other things in there just not as nice getting at them without the trays.

Can not remember tire size of the top of my head, but they are stock sahara.
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Unread 01-23-2015, 12:05 AM   #9
mike718
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I have a full size 20" spare in the spare compartment right now with no problem and the cover is still able to cover it, the same should also be with the 18".
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Unread 01-23-2015, 08:40 AM   #10
FreeJersey
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Quote:
Originally Posted by Steiner84 View Post
Short answer, no.

Since you have the 18's, I assume you are running stock 265/60R18 right now. I just upgraded mine to 275/65R18 and thus, changed out the spare so it has the same diameter. So the spare I have in my compartment right now is a 255/70R18, thinner than your stockers. The lid on my compartment rests on the tire; it doesn't fully close. The bottom of the lid sits flush with the top of the cargo area. So it doesn't fall into the recess, but there's also no visible gap into the compartment.
I'm running the same size spare and have no trouble closing the lid. Did you remove the styrofoam spacer underneath the spare?
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Unread 01-23-2015, 02:31 PM   #11
PMHSLight
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Thank you all for the feedback. I havent bought an extra rim and tire yet but I feel confident that as long as I stick to a stock rim and tire it should hopefully fit!
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Unread 01-23-2015, 07:42 PM   #12
FreeJersey
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Quote:
Originally Posted by PMHSLight View Post
Thank you all for the feedback. I havent bought an extra rim and tire yet but I feel confident that as long as I stick to a stock rim and tire it should hopefully fit!
You may want to check that. I'm not so sure a 265 will fit in the well. Why not just pull one off and see for yourself?
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Unread 01-24-2015, 10:21 AM   #13
jim_in_PA
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Quote:
Originally Posted by FreeJersey View Post
You may want to check that. I'm so sure a 265 will fit in the well. Why not just pull one off and see for yourself?
I agree with this thought...test that the fit will be to your liking with one of the wheels/tires already on the vehicle before you spend money on an extra wheel and tire. There is a reason that the factory "full size" spare is the size it is width wise.
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Unread Yesterday, 07:04 PM   #14
Nonstop
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Im using the stock 18"wheel and 265/60/18 general something with good tread at 34psi.
I have a spare that looks like a crappy donut, no idea if they call it full size, it's sad.
[IMG][/IMG]

I put the 18" in with the compartment easily, and the trays locked in and made no difference. but.
[IMG][/IMG]
The lid was held open barely the thickness.
[IMG][/IMG]

With a good push it latched and the leading and trailing edges where flush, the sides where about 95% lined up. I'm doubtful if the stress will ever cause any damage
I also tossed a JK wheel with a 255/70/17 in and it closed the same without the trays. The Jk 17's won't clear my calipers though so.

Yes a stocker 18 will fit full pressure with a small push to latch the lid.
I'm excited to know as I really like having a matching 5th on a road vehicle.
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