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Modified JK Tech Tech related bulletin board forum regarding subjects such as suspension, tires & wheels, steering, bumpers, skid plates, drive train, cages, on-board air and other useful modifications that will help improve the performance and protection of your Jeep JK Wrangler (Rubicon, Sahara, Unlimited and X) on the trail.

PLEASE DO NOT START SHOW & TELL TYPE THREADS IN THIS FORUM

time for tires

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Old Dec 12, 2009 | 02:33 PM
  #1  
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Question time for tires

I know, "Search", but I'm getting no where with my specific questions...

Currently have 255/70R18's.
I'm looking at getting a little bigger/wider. Same wheels, no lift, but I'm thinking of spacers.

What size(s) can I look at??

I really like the Interco M16's, but I'm hearing about balancing issues?!?! Is that true, or just the nay-sayers dominating...
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Old Dec 12, 2009 | 02:54 PM
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From the Modified FAQ section for JKs with no lift-

Q: What is the biggest size tire I can fit on my stock Jeep JK Wrangler?
A: The largest tire size that the factory recommends is a 255/75R17 (which comes standard on Rubicon models) or a 32x10.50. However, there are many Jeep JK Wrangler owners who are currently running as big as 285/70R17 or 33x10.50's with little to no rubbing issues.

I run 33x12.50s but changed my wheels. If you want to invest in spacers, you can go 12.50 on stock wheels......but why? By the time you buy spacers and the super expensive 18" tires, you could have bought 15" or 16" wheels and new tires for the same money.

That's what I did! Here's my thread in case you are interested: https://www.jk-forum.com/forums/modified-jk-tech-2/15-pro-comp-wheels-goodyear-duratracs-97128/
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Old Dec 12, 2009 | 03:15 PM
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A 285/65/18 is about a 1/2" taller and a little over an inch wider. 275/70/18 is also a common size, about an inch taller and almost an inch wider.
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Old Dec 12, 2009 | 05:11 PM
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Interco makes some very rugged tires but that toughness makes those tires heavy.

The M16 and others liike the SSR are similar in this respect to the popular Toyo MTs.

One partial exception are the Goodyear MTRs with Kevlar, which use Kevlar to make the sidewalls bullet proof, but the tread is not as aggressive as the Intercos or Toyos.

A heavy tire unless manufactured to very tight specs is going to require more weight to balance in most cases.

With 1.25-1.5" spacers you can mount up to 12.5" wide tires.

Just for a point of reference for 35x12.5R18:

M16 weigh 83 lbs
Toyo MT weigh 81 lbs
KM2s weigh 67 lbs
MT/R with Kevlar 65 lbs (11.5" wide)

It is a simple tradeoff.
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Old Dec 12, 2009 | 05:59 PM
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Originally Posted by JeepDawg
That's what I did! Here's my thread in case you are interested: https://www.jk-forum.com/forums/showthread.php?t=97128
Nice rig JeepDawg!!
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Old Dec 12, 2009 | 06:02 PM
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Originally Posted by ScottW
A 285/65/18 is about a 1/2" taller and a little over an inch wider. 275/70/18 is also a common size, about an inch taller and almost an inch wider.
Great info!! I like the +'s of the 275/70/18...
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Old Dec 12, 2009 | 06:11 PM
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Originally Posted by spinlock
Interco makes some very rugged tires but that toughness makes those tires heavy.
The M16 and others liike the SSR are similar in this respect to the popular Toyo MTs.

One partial exception are the Goodyear MTRs with Kevlar, which use Kevlar to make the sidewalls bullet proof, but the tread is not as aggressive as the Intercos or Toyos.

A heavy tire unless manufactured to very tight specs is going to require more weight to balance in most cases.

With 1.25-1.5" spacers you can mount up to 12.5" wide tires.

Just for a point of reference for 35x12.5R18:

M16 weigh 83 lbs
Toyo MT weigh 81 lbs
KM2s weigh 67 lbs
MT/R with Kevlar 65 lbs (11.5" wide)

It is a simple tradeoff.
Wow! Now I'm learning!!
So, if I read between the lines, the M16's aren't to be feared?!?!
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Old Dec 13, 2009 | 07:50 AM
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Just throwing this out there... a 285/70R17 is a 33x11.50 - 17.
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Old Dec 13, 2009 | 12:34 PM
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Originally Posted by Sgt P
Wow! Now I'm learning!!
So, if I read between the lines, the M16's aren't to be feared?!?!
IMO, you should be aware of the impact of mods, not fear them.

Just make informed decisions.

If you don't mind a heavy but rugged the M16s are a very good choice.

I would be more concerned with the tire weight than the lead to balance it.
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Old Dec 21, 2009 | 03:58 PM
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Default bought DuraTracs

I went with the Goodyear DuraTracs (275/70-18).

WOW! They look great! And, are NOT noticeablely louder (with the radio on!)

Slight rub turning hard left, so spacers coming, plus that will add to the aesthetics, pushing them out just past the flares (they sit just at the inside edge with the stock wheels and new tires.)

I'll post pic's after the spacers.

My concerns with the M16's were longevity with lot's of highway miles. I've always had good luck with GY's...
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