Jeep Commander Forum banner

1 - 20 of 26 Posts

·
Registered
Joined
·
186 Posts
Discussion Starter #1 (Edited)
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:

http://www.jeepcommander.com/forums/showthread.php?t=8393
 

·
Registered
Joined
·
2,405 Posts
Very informative. This has always been mysterious to me. Thanks for putting this together.
 

·
Registered
Joined
·
266 Posts
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 ?
 

·
Registered
Joined
·
186 Posts
Discussion Starter #4
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/
 

·
Super Moderator
Joined
·
15,101 Posts
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.
 

·
Premium Member
Joined
·
6,309 Posts
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.
 

·
Registered
Joined
·
8 Posts
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,
 

·
Registered
Joined
·
4 Posts
what are the spec of the wheels i should buy if i want to remove the 1.5 spacer... and keeping the look,
looking to get 265/70/17... with aftermarket wheels...
thanks for the awnser
 

·
Premium Member
Joined
·
6,309 Posts
A 17x8 with +6mm offset (4.7 inches of back spacing) would be identical to your current package with 17x7.5 oem wheels with 1.5 inch spacers on 265/70R17's. It's probablly going to be hard to find a 17x8 with +6mm offset so you'll have to find something close to that.
 

·
Registered
Joined
·
542 Posts
^^^Bro, so a 17x8 +0 with a 4.5" BS will not work? Looking at running 265/70/17 Duratracs.....

Edit: 17x8 +0et, 4.5" bs
17x9 -12et, 4.5" bs
17x9 +18et, 5.7"bs

Which one will work best with either Duratracs or Nitto Trail Graplers (265/70/17)?
 

·
Premium Member
Joined
·
181 Posts
You guys all cover the bases pretty well on wider tires but few have ventured any info on narrower ones with larger diameters. I'm curious if anyone has installed 225/80R17s or 235/80R17s and likewise a more popular size 235/75R17?

Also, tire diameter can vary from brand to brand even with the same tire "size". What is the maximum tire diameter that will clear that bolt just above the front wheel.

Secondly, has anyone done a modification to make that bolt/stud shorter?

Thanks.
 

·
Registered
Joined
·
936 Posts
i am runnin an RC 2" lift with 265/70R17s, can i use a 17x9 with -12mm offset?, according to the calculator it works out to 4.5" backspacing

i am currently running stock wheels with 1.5" spacers.. and i would like to get the same stance if not maybe a 1/4" wider if possible...any ideas

i have researched and researched but the more i dwell on it the more confused i get (i am not a rim guy at all)!!!
 

·
Registered
Joined
·
4 Posts
Hey guys, just purchased a used 2007 Limited with the 4.7L V8. I'd like to get taller tires but keep the stock wheels. What's the max, that you know of, that I can go without running into rubbing issues? I've heard some say that they've gone 245/75/17 with no issues and no lift either. Any help will be much appreciated. Thanks!
 

·
Registered
Joined
·
4 Posts
I talked to a guy at Tirerack and he said he has a Commander as well and is running 245/70/17's and wouldn't go any larger. I could go wider to a 255 or 265 so I'm thinking of going with a 255/70/17. My wife is putting the hammer down on me putting a lift on it so I'm stuck with sneaking in a little extra clearance with my tires. Thoughts on this at all? Any recommendations?
 
1 - 20 of 26 Posts
Top