18" rims to 20" swap - Jeep Garage - Jeep Forum

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  #1  
Old 12-31-2014, 11:22 AM
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18" rims to 20" swap

I've got the 18" factory rims with 265/60/18 tires on my 2014 Grand Cherokee Limited. I'm thinking about getting a set of OEM 20" rims and I would like to keep the overall diameter the same with 265/50/20 tires. There are not a lot of tire choices in that size and I'm hearing that a slightly larger size tire would work. I don't want any warranty or mechanical issues. Are there any suggestions out there. There are some nice wheel and tire combinations available from Detroit Wheel and Tire, but most include the Goodyear Fortera's as the tire. How are they? I need something that will work in occasional deep snow. Thanks

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Old 12-31-2014, 11:56 AM
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Re: 18" rims to 20" swap

There are more tires choices this year than last year at this time. I traded in my Forteras at 100 miles this October for tires below. These tires became available in 265/50/20 this past spring.
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Old 12-31-2014, 12:31 PM
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Re: 18" rims to 20" swap

thanks for the reply. Have you had a chance to try them in deep snow? From what I'm hearing, they can stay on all year round.
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Old 12-31-2014, 02:13 PM
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Re: 18" rims to 20" swap

One of the top rated all season tires , the Continental Cross Contact LX20 is available in that size as is the Nitto Terra Grappler G2, although that is more of an all terrain tire.
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Old 12-31-2014, 04:43 PM
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Re: 18" rims to 20" swap

The Nokians sound good. Any ideas about best online source/prices
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Old 01-01-2015, 03:41 PM
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Re: 18" rims to 20" swap

Could anyone who has switched from 265/60/18 t0 265/50/20 comment on changes including the pros and cons concerning handling, acceleration, braking, and especially ride quality. I would imagine that road noise would depend a lot on the type of tread chosen. I've got a nice set up as it is, I just like the look of the 20's better.
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Old 01-02-2015, 07:28 PM
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Re: 18" rims to 20" swap

Quote:
Originally Posted by Stevm65 View Post
Could anyone who has switched from 265/60/18 t0 265/50/20 comment on changes including the pros and cons concerning handling, acceleration, braking, and especially ride quality. I would imagine that road noise would depend a lot on the type of tread chosen. I've got a nice set up as it is, I just like the look of the 20's better.
I didn't make the switch on the GC but I can tell you from experience that the 20" wheels will result in better handling. A lower profile sidewall yields less under lateral stress compared to a tall sidewall. A taller sidewall will also tend to under steer in comparison. More "squirm", if you will.
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Old 01-02-2015, 09:14 PM
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Re: 18" rims to 20" swap

Nice

---------- Post added at 02:13 AM ---------- Previous post was at 02:13 AM ----------

Nice sane here

---------- Post added at 02:14 AM ---------- Previous post was at 02:13 AM ----------

Same here
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Old 01-03-2015, 09:48 AM
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Re: 18" rims to 20" swap

While I agree that the 20 will give you better handling, the 18 will give you a better ride. With the 20's, small bumps seem exaggerated, and you will feel even a crack in the roadway. With the 18's, cracks are not noticeable and small bumps feel like cracks. This is with the stock size tires, upsizing the 20's to something like a 275/55/20 will give you results similar to the stock 18's.
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Old 01-03-2015, 10:30 AM
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Re: 18" rims to 20" swap

Thanks,
That makes a lot of sense. By going to the 275/55 you can keep the sidewall height, maintaing the ride quality. On a comparison chart, it looks like the diameter increases 1.5". Any fitment problems? The speedometer may be just a little off. It's a 2014, do you think putting this size affect the warranty?
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Old 01-03-2015, 11:38 AM
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Re: 18" rims to 20" swap

I want to thank everybody for their input and apologize if this is all redundant because of much previous information. I have searched and read a lot and I got a little confused by all the information and wanted to get some new opinions. There was a picture of the 275/55 /20's under the fender showing the proximity to the upper ball joint and it was close. It looks like some of the suspension options may be a factor. I have just a regular 2014 Limited and the last post helped me with the ride concerns. Now it's just about no fitment issues and if putting larger tires will give the dealer an excuse to be difficult if a warranty issue comes up. Again I apologize for going over old material, but it's been helpful.
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Old 01-04-2015, 11:19 AM
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Re: 18" rims to 20" swap

As far as fitment goes, I had no issues with the 275/55/20 when I first put them on. Then I added 1.25" wheel spacers to bring the wheels out flush with the fenders. At that point, I had some minor rubbing on dips at highway speed and off road. I then added the RRO 1.75" leveling kit and the rubbing went away. Don't worry about the upper ball joint, it moves with the tire, it never gets closer as you drive. As far as the warranty goes, the dealer would have to prove that the larger tires caused the problem to deny coverage. That and most Jeep dealers don't care anyway, they're used to it, as long as they get paid by Chrysler for the repairs, they will fix just about anything. The size differnce cause a 4.9% difference in the speedometer/odometer. If the speedo says 40, you're really doing 42; 60=63, 80=84, etc. at any speed lower than that, it is really negligible.
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