New Wheels? Here are the calculators you need! - 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 26 (permalink) Old 03-28-2009, 11:40 AM Thread Starter
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New Wheels? Here are the calculators you need!

I hope this thread will take some of the time and work out of the consideration of adding new wheels and tires to your XK.

I've been doing a lot of research about new wheel sizes, backspacing and offset, etc. After I install my 2.25" RR lift, I would like to go to a wider wheel (17x9) with different backspacing and offset as well as a bigger tire. The whole thing can be very confusing as to how all these sizes affect the total inner clearance as well as how much the wheels will be pushed out for a wider stance. What I have found out is that anyone who is considering wheel spacers really should think about new wheels all together. Quality wheel spacers can run about $100 per wheel. There seems to be some questions about the potential safety of having an extra 5 lugs on each wheel staying tight as well as possible premature wear on wheel bearings, etc. There are some nice wheels out there in the $175 per wheel price range. Many are teflon coated so you don't have to change wheels for winter if you live where the snow flies. Also, you can sell your stock wheels on eBay for about $300 for the set and put that money towards your project if you so choose. In my case it actually comes out cheaper to throw new wheels on than to buy and use wheel spacers and I get a more customized look. O.K. - I know that was long winded, but here are some useful tools if you are considering a new set of wheels:

First of all, a little house cleaning with stock sizes and definitions of the terminology:

The stock measurements for Commander wheels are as follows: 17x7.5" wheel with 6.5" of backspacing and 47.3mm of offset.

Backspacing: To visualize this, imagine taking your wheel off the truck and laying it FACE DOWN on the floor. Lay a straight edge across the back of the rim and measure from the straight edge down to the hub mounting surface (the flat area where the wheel meets the rotor when installed). This is your backspacing measurement.

Offset: The offset of a wheel is the distance from its hub mounting surface to the centerline of the wheel. The offset can be one of three types, zero, positive or negative. Here is a short but informative page on offset:

http://www.tirerack.com/wheels/tech/techpage.jsp?techid=101

Here is the cat's meow of calculators when it comes to figuring all this out. It allows you to put in all of the criteria of tire size, wheel size and wheel offsets to make a side by side comparison including a visual of both wheels side by side with measurements and every spec you could possibly hope for is included!.

http://www.bigcustomwheels.com/info_specs.jsp

***The only other thing you would need to take into consideration is the difference in backspacing. The stock backspacing is 6.5". If you were thinking of buying a wheel with 4.5" of backspacing, you would be pushing the wheel out an additional 2" on top of what the calculator says. On the other hand, if you were buying a wheel with 2.5" of backspacing, you would be moving the wheel in by 2" and subtracting that from what the calculator says.

Also, here is a link to another thread on here that goes through what tires can be used on stock as well as with different lift packages:

https://www.jeepcommander.com/forums/...ead.php?t=8393

Last edited by OnATrail; 06-07-2009 at 08:56 PM.
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post #2 of 26 (permalink) Old 03-28-2009, 08:37 PM
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Very informative. This has always been mysterious to me. Thanks for putting this together.

2007 XK Limited, 5.7L Hemi, QDII, Rusty's 2" lift, Spidertrax 1.5 inch wheel spacers, GetLost4x4's front hitch mount for portable winch.GY Duratracs 265/70R17s , Rola Roof Rack, diy built spare tire mount for the roof rack.
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post #3 of 26 (permalink) Old 10-14-2009, 03:05 PM
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Ok so with your RR2.25 lift wr you able to go to 17 X 9 and what size tires did you end up with ...i ask becouse i was wanting 8.5 but thats hard to find and that would limit me to 265X70/17 and some tires (mt's) don't offer in that size only 245 or 285
with a 17X9 i could go to 285X70/17 but will it work with my soon to be RR 2.25 lift and if yes on the 17X9 what backspacing or offset will i need ?
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post #4 of 26 (permalink) Old 10-15-2009, 09:06 AM Thread Starter
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Wheels and tires

I went with a 17x8.5 AEV Pintler wheels and 265/70/17 Goodyear Silent Armors. I had to reshape the wheel well liners with a heat gun and I still have a tiny amount rub at full lock, but barely. Surely not enough to do any damage to the tires an definitely not enough to do any more work to the truck.

Here are some pics:

http://s570.photobucket.com/albums/ss142/OnATrail/
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2006 Commander Limited, 5.7L HEMI, Quadra-Drive II, NAV, 2.25" Rocky Road Lift, AEV 17 x 8.5" Pintler Rims with +10mm offset, Goodyear Silent Armor 265/70/17's, 4xGuard Matrix and grill hoop, PIAA 525 dual beam auxiliary lights, K&N Cold Air Intake, Full skid plates, Tinted fronts, Rear hitch shackle, Yakima bike carrier, Thule Atlantis 1800 roof carrier.
Current Wish list: 4xGuard Front Skid Plate, Rear tire carrier?!?!


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post #5 of 26 (permalink) Old 12-08-2009, 02:02 PM
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Is a 17" wheel the only size that will fit?
Can a smaller diameter wheel fit? 16"? 15"?
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post #6 of 26 (permalink) Old 12-08-2009, 02:05 PM
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Quote:
Originally Posted by chumpmann View Post
Is a 17" wheel the only size that will fit?
Can a smaller diameter wheel fit? 16"? 15"?
Anything smaller than 17" will not clear the brake calipers.

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post #7 of 26 (permalink) Old 03-22-2010, 08:09 PM
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Quote:
Originally Posted by OnATrail View Post
The stock measurements for Commander wheels are as follows: 17x7.5" wheel with 6.5" of backspacing and 47.3mm of offset.
Actually the stock XK wheels have 6 inches of back spacing with 43.8mm offset.




2007 4.7 Liter XK | Front OME MD Springs w/Superlift Preload Spacer | Rear 4" Superlift Springs | Bilstein 5125 Rear Shocks | JBA UCA's | Rusty's Rear Adjustable Track Bar | Black Rock 997 Wheels | Fred Goeske 1/4 Inch Wheel Spacers | 305/70R17 Goodyear Wrangler MT/R w/Kevlar | Airflow Snorkel | Flowmaster 40 Series Muffler | Superchips Flashpaq | Mopar Skids | 4xGuard Belly Guard | American Rebel Rear Diff Cover | Rear Powertrax No-Slip | Front E-Locker | Rear Heat/AC Delete

Last edited by 07JeepXK; 03-22-2010 at 08:27 PM.
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post #8 of 26 (permalink) Old 08-26-2010, 01:04 PM
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Here's a dumb, possibly simple question. I have an '09 Commander with RC 2" lift with 1.5" spidertrax spacers on stock 17" rims with BFG 245/75/17 all terrains. All the clearances are good, just some minor, minor rub that I'll fix with pulling back the wheel housing that should fix this. The tire shop completely scratched all, yes all the outer surfaces of my rims. They owe me 4 new rims. Question is, are there any off the shelf aftermarket rims that have the proper backspacing that would let me eliminate the spacers? I just now found this out and have to look for some new rims that this shop will pay for. I'd like to compromise with them, obviously aftermarket rims will be less expensive for them and possibly an upgrade for me. I've got the advanced TPMS on the truck as well.

Thanks,
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post #9 of 26 (permalink) Old 12-09-2010, 01:30 AM
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That's all what I am looking for. Thanks a lot
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post #10 of 26 (permalink) Old 02-14-2011, 08:59 PM
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Calculator page moved to here:

http://www.rimsntires.com/specs.jsp

JCIII

07' 4.7 Sport/ 2" RC Lift / K&N CAI / 245/75 17 Revo 2's / Sport Utility Crossbars / Yakima Mega Warrior rack with extension, wheel holder, & light mounts /
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