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Old 08-14-2010, 01:33 PM   #1
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Help with wheels/tire size

Hi.

A few weeks ago i bought a stock 2007 JK Sahara.
I have to change the tires as they are probably 3 years old and i want smaller rims too.

Now i have the stock 255/70R18 tires.
I want to go with 16" (or even 15") rims.

The 255/70R18 are 32" and i assume 33" will be too big without a lift.
Right?

I'll use the jeep for light offroad maybe once or twice per month and the rest of time, traveling
No commuting (i use a bike for it).

I decided to go with BFGoodrich All-Terrain T/A KO or Goodyear Wrangler DuraTrac (which one i can find ... cheaper :P)

Now, i have a few things i don't understand...

For BFG:
275/70R16 are only ~31" while 285/75R16 are 32.8"

I can't see any sizes in between.

Same with DuraTrac, the choices are:
265/75R16 which are about 31.5" and 285/75R16 (32.8")


Aren't 285/75R16 too big?
I mean they are almost 33" and if i can fit 33" then 33X12.50R15 are cheaper.


Can you guys recommend me a combination of cheap 15"/16" steel wheels and which of the tires i can use on them?
What backspace/offset for the wheels and also, if i have to use spacers, which size?

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Old 08-14-2010, 02:49 PM   #2
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If you buy the right backspaced wheels you won't need spacers. 32's are as tall as you can go on a JK, you can put 15" wheels but you may need to grind down the calipers to keep from hitting them.

Someone more familiar with JK backspace will pipe in soon. I think probably about 4" is good, but not sure since I don't have a JK.

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Old 08-14-2010, 03:24 PM   #3
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Any time you go BIGGER than jeep offers as stock size, you open up a bag of worms, that you have to be ready to tackle--

Any 32" tire, no matter what size wheel 15/16/17/1" is actually 31+" installed and NO PROBLEMO's

If you put on any tire thATS ADVERTISED AS 33', IT AIN'T, IT'S ABOUT 32" INSTALLED, then you will start the bag of worms--"rub" on sharp turns--"rub" bumper-maybe !!

If you put Larger 33" tires (mine are 33.6") then you have to, 1) get lift, 2) change bumper, 3) trim fenders, 4) extend bumpstops, 5) changs shocks, 6) change diff. gearing---

There ain't nomore free lunch's

Good luck

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Old 08-14-2010, 11:21 PM   #4
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Well, as i said, now i have the stock 255/70R18 on 18" wheels ofcourse.
They are about 32"

Thing is, BFG T/A KO are 275/70R16 and DuraTrac are 265/75R16 so both smaller than my 255/70R18

I can't afford a lift and change tires/wheels now unfortunately so, no 33" but i want wheels i can use for 33" later next year.

Finally, 285/75R16 are too big or i can use them?

Or better question, which of the BFG/DuraTrac i can use and which steel wheels you guys recommend (in terms of offset backspace) ?
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Old 08-15-2010, 01:36 PM   #5
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Because i can't afford a lift yet, i decided to stay with 32" tires for now:
BFGoodrich Mud-Terrain T/A KM2
BFGoodrich Mud-Terrain T/A KM2 Tire, 32x11.50R15 and Other Jeep Parts and Jeep Accessories by 4 Wheel Drive Hardware-RH3

And for wheels:
Series 97 Black Soft 8 Wheel by Pro Comp
Series 97 Black Soft 8 Wheel by Pro Comp and Other Jeep Parts and Jeep Accessories by 4 Wheel Drive Hardware-RH3

Question is: can i use them together?
And the wheels can be used with 33" tires later after i will get a lift?
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Old 08-15-2010, 02:17 PM   #6
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I don't agree with using 15" wheels with the JK jeeps, but



Quote:
Originally Posted by J.H. View Post
Because i can't afford a lift yet, i decided to stay with 32" tires for now:
BFGoodrich Mud-Terrain T/A KM2
BFGoodrich Mud-Terrain T/A KM2 Tire, 32x11.50R15 and Other Jeep Parts and Jeep Accessories by 4 Wheel Drive Hardware-RH3

And for wheels:
Series 97 Black Soft 8 Wheel by Pro Comp
Series 97 Black Soft 8 Wheel by Pro Comp and Other Jeep Parts and Jeep Accessories by 4 Wheel Drive Hardware-RH3

Question is: can i use them together?
And the wheels can be used with 33" tires later after i will get a lift?
Those ProComp 15x8" "soft" steelies have a good strength history and should be good for tires (any) up to 35" diameter--they have the correct backspace for the JK calipers--so yes

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Old 08-15-2010, 02:34 PM   #7
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Quote:
Originally Posted by JIMBOX View Post
I don't agree with using 15" wheels with the JK jeeps
Can you explain a bit more ... why?
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Old 08-15-2010, 02:52 PM   #8
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33"s will fit and you won't have to change anything other than wheels with proper backspace. You will rub the fenders if you go wheelin' and do much flexing but they will fit and not rub otherwise. Hell, I had 33s on my TJ with everything completely stock and had no rubbing issues unless I took it off-road and got into some flexing situations.

Now, with that said, it certainly isn't ideal. I just didn't want you to think that you couldn't do it if you wanted to. Depending upon what you plan to do with your Jeep, 33s on stock might work out for you just fine.
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Old 08-15-2010, 03:09 PM   #9
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I once said, that as soon as you change the DESIGNED STOCK size of tire/wheel--you open a bag of worms !!

If you just put 33" tires on stock wheels and go "straight" forever--no problems, but

All 33" tires are a little different size installed and you will start having RUB-INS-you will have to change something ie: Back space/spacers/bumpers/steering stops--

I don't agree with 15" wheels because the idea is 50 years old and except for EXTREME rock crawling, there's no reason for the excessive amount of sidewall exposure using 15" wheels!

They are too close to brake calipers and tire availability is greater in 16" tire size

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Old 08-15-2010, 09:54 PM   #10
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Ford Lincoln Mercury dealers are offering $100 rebate throught August 2010 when you purchase a set of 4 Goodyear tires (and lifetime rotation). If you are a member of treadlightly or join, you will be eligible for $100 rebate on the purchase of 4 Goodyear tires through the end of August 2010. It costs $25 to join treadlightly.

For me, the $175 rebate made the choice for me: DuraTracs.

As far as cheap wheels: there are a few choices around $50 bucks each.
A lot of Jeepers go with the Cragar soft 8s but for the same price, I prefer the Cragar series 342 "D" window. I'm toying with the idea of putting some old-fashion hot rod "slotties" on the Jeep if I can get them for the right price.

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