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Old 09-10-2010, 02:18 PM   #1
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Tire Size

Ok just wanted to ask specifically what size tire can I go with on my JK. So right now I have Goodyear Wrangler STs 225/75/16. So I know they are on 16" rims and the tires are 29s. Way too small lol. First question what is the largest tire size that I can go to without a lift? I also do not plan on using spacers. I have not gotten into offroading but definitely want to dabble in it . So I have heard good things about the Duratracs so I have been looking at those. I was told it was a good all terrain tire as this jeep is also a daily driver. So when looking at tire sizes what is the versions I can go up to? I'm new to this tire information so excuse the newb questions. I see on their site all the different variations of 225/75/16 but don't know what would fit and what wouldn't. I obviously know it has to be 16 as that is the rim I have...but as for the other two numbers I'm clueless. The tires I have on are way too small and look like toy tires lolol. Along with the tire change I also just ordered (or rather putting the order in right now) new bumpers and also am buying some Raptor lining and will tear out all the carpet

Thanks!

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Old 09-10-2010, 02:19 PM   #2
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I like the look of 33's but think I would need a lift. If so what size lift would I need? I'm assuming a 2" or so

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Old 09-10-2010, 03:44 PM   #3
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This will help you decipher metric to inches... 1010TIRES.COM® — Tires and Wheels Absolute Authority. use the calculator. 255x70x17's come stock on Rubicons. That's about a 32" tire. That will be the largest recommended size without rubbing or having to trim stuff. Width is what will hang you up if you don't add spacers or buy new wheels.

Edit: yes you'll need 2" lift for 33's to gain adequate clearance.
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Old 09-11-2010, 12:30 PM   #4
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The thing is I have 16" rims (I have an Unlimited X). For some reason my stock tires are 225/75R16 and are tiny. Feel like I'm driving a tonka toy compared to other jeeps. Obviously I know I have to stay with the R16 becuase those are the rims I have. But I am wondering what combo of the 225/75 I can go to without issues rubbing etc. I would love to get the largest possible without the lift. Though I am still considering a lift as I think I want 32's and that would require a lift. I know very little about lifts and tires sizes as you can see. I am trying to read more and learn so that I can start doing some offroading. Just sucks there isn't much here in South Florida.
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Old 09-11-2010, 12:38 PM   #5
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32's will fit fine on a stock JK.... no lift required, but to go wider you need spacers or different wheels with less backspacing.
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Old 09-11-2010, 01:05 PM   #6
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Sorry to be such a newb but what tire size then would I be looking at? I am referring to the 225/75 number. Like I said I have very little knowledge in that area. I see that Duratrac has a couple different tires that would be considered 32"s that would fit my rim.

Here is their site with all sizes for the Duratracs. Goodyear Tires | SUV and Truck Tires | Wrangler DuraTrac

Also I have heard that this is a good all terrain tires. That true?
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Old 09-11-2010, 02:31 PM   #7
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Originally Posted by anthony20031 View Post
Sorry to be such a newb but what tire size then would I be looking at? I am referring to the 225/75 number. Like I said I have very little knowledge in that area. I see that Duratrac has a couple different tires that would be considered 32"s that would fit my rim.

Here is their site with all sizes for the Duratracs. Goodyear Tires | SUV and Truck Tires | Wrangler DuraTrac

Also I have heard that this is a good all terrain tires. That true?
On your JK with 16" rims you can do either 265/75/16 (32 inch tires) or 245/75/16 (31 inch tires) with no problem. Here are the 31" Duratracs on my 2010 JK with stock 16" rims. The tire size is 245/75/16. These are the best AT tire Goodyear has ever made and also probably the best currently available for all AT tires.
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Old 09-11-2010, 02:38 PM   #8
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On your JK with 16" rims you can do either 265/75/16 (32 inch tires) or 245/75/16 (31 inch tires) with no problem. Here are the 31" Duratracs on my 2010 JK with stock 16" rims. The tire size is 245/75/16.
Awesome. Thanks for the help! How do you like the Duratracs? I'm also assuming I won't have rubbing issues with 32s?
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Old 09-11-2010, 02:42 PM   #9
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Stock jeeps are coming from factory with 32" tall tires. You could even fit 33" tall.
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Old 09-11-2010, 03:08 PM   #10
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Originally Posted by ESP123

On your JK with 16" rims you can do either 265/75/16 (32 inch tires) or 245/75/16 (31 inch tires) with no problem. Here are the 31" Duratracs on my 2010 JK with stock 16" rims. The tire size is 245/75/16. These are the best AT tire Goodyear has ever made and also probably the best currently available for all AT tires.
I will second the motion on how great the Duratracs are! Have 25k on ours now and they are holding up great on and off road.
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Old 09-11-2010, 03:31 PM   #11
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Stock jeeps are coming from factory with 32" tall tires. You could even fit 33" tall.
Wouldn't you have issues of rubbing?
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Old 09-11-2010, 03:48 PM   #12
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you can when fully flexing or full wheel lock with 33 but since your driving a Sport model, you'd only have to watch the turning.
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Old 09-11-2010, 04:28 PM   #13
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Also keep in mind that anything above 32 and you'll start needing to do a lot of other things to make it work. Your MPG will be off, you'll lose accelerating power with re-gearing or tuning, your MPG will also suffer much more from higher rolling resistance..etc
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Old 09-11-2010, 05:06 PM   #14
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might need to stick with 32s then for now...we'll see
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Old 09-11-2010, 05:22 PM   #15
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Originally Posted by anthony20031 View Post
I like the look of 33's but think I would need a lift. If so what size lift would I need? I'm assuming a 2" or so

33's will fit fine so long as you get a wheel with 4.5" of backspacing or less. No lift needed.

Duratracs are awesome! Get some. hxxp://www.goodyeartires.com/goodyeartireselector/display_tire.jsp?prodline=Wrangler%20DuraTrac&mrkt area=Light%20Truck

This message board has some great info: hxxp://www.jk-forum.com/showthread.php?18617-MODIFIED-TECH-FAQ-Answers-to-the-Questions-Every-Newbie-Has&p=211274#post211274
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Old 09-12-2010, 11:00 AM   #16
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Originally Posted by ESP123
Also keep in mind that anything above 32 and you'll start needing to do a lot of other things to make it work. Your MPG will be off, you'll lose accelerating power with re-gearing or tuning, your MPG will also suffer much more from higher rolling resistance..etc
AEV procal works great for making tire and gear corrections and only cost 150 new, can usually find them cheaper on forums/eBay though
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Old 09-12-2010, 11:20 AM   #17
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You don't REALLY need the lift with most mfg 33" tires, cause they'll measure around 32+ inch's when installed, but

If you get BIG 33's- you'll be much better off with a 2.5" lift



Mine are 33.2" installed and I had to replace the bumpers too, but it'll workout !!

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Old 09-12-2010, 03:24 PM   #18
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You don't REALLY need the lift with most mfg 33" tires, cause they'll measure around 32+ inch's when installed, but

If you get BIG 33's- you'll be much better off with a 2.5" lift



Mine are 33.2" installed and I had to replace the bumpers too, but it'll workout !!

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^^^^^What he said.
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Old 09-12-2010, 03:35 PM   #19
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Quote:
Originally Posted by JIMBOX
You don't REALLY need the lift with most mfg 33" tires, cause they'll measure around 32+ inch's when installed, but

If you get BIG 33's- you'll be much better off with a 2.5" lift

Mine are 33.2" installed and I had to replace the bumpers too, but it'll workout !!

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Hi JIMBOX
So are you saying you did get a 2.5 lift to fit your 33's? It's a nice looking Jeep.

Thanks
Mike
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Old 09-12-2010, 04:03 PM   #20
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Thanx Mc, yea thats a RC steel spacer 2.5" lift and I'm using fairly expensive RS9000XL (adj) shocks ($100-ea)


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Hi JIMBOX
So are you saying you did get a 2.5 lift to fit your 33's? It's a nice looking Jeep.

Thanks
Mike
But it really is a good combo, I've heard some good/bad reports on the RC shocks, but more good than bad, you know, combo RC lifts/shocks !!

I don't haver any experience with them though !!

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Old 10-18-2010, 11:40 AM   #21
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Thanks for the pic and the post. I had just ordered these tires and I was looking for someone who had similar. They look great! Now it puts my mind at ease that they will look great on my JK sport.
Will post a pic once they are installed. Thanks for the help.
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Old 10-18-2010, 12:03 PM   #22
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Here's what 32" 275 60r 18's look like on my JK. They're a lot taller than they are wide and will give you about an inch and a half more height. Trust me--you'll notice an inch and a half of height the second you jump in your Jeep. They rub a tiny bit on very sharp turns but nothing serious. They rub just enough to knock the dust off--they don't actually scrub. No scrub marks on the insides of the tires. As you can see from the pics you'll have plenty wheel well clearance. You have plenty more options with 16" wheels than I have with my 18" wheels. Hilldweller has a nice set of tires on his JK. I'm sure you'll be fine with a set of 33's on 16 inch wheels.
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Old 10-18-2010, 12:26 PM   #23
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Correction: Here's what 32" 265 70r 18's look like on my JK. They're a lot taller than they are wide and will give you about an inch and a half of height. They rub a little on sharp turns but nothing serious. As you can see from the pics you'll have plenty wheel well clearance. You have plenty more options with 16" wheels than I have with my 18" wheels. Hilldweller has a nice set of tires on his JK. I'm sure you'll be fine with a set of tall 33's on 16 inch wheels. Be sure to find a tire dealer that knows the height differences of the various brands of tires. It seems it would be common knowledge for a tire dealer but some dealers DON'T know and will sell you anything just to make a sale.Some brands are wider while some brands are taller. Opt for the TALLER brand over wider brand in order to fit the largest possible tire. If you want more aggressive tread then you may have to stay within 32" tires for the best fit. Some 32" and especially 33" tires are shorter but a lot wider an will scrub.
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Old 10-18-2010, 01:58 PM   #24
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I had 295/70/17s on my stock 2dr jk with 4.5 backspaced wheels and had zero issues with rubbing, the only time I actually got any rub was when I disco'd the swaybars and got some major flex going on. If you run a 265/70 you will definitely have more than enough room with a stock setup on aftermarket wheels.
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Old 10-18-2010, 03:13 PM   #25
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I had 295/70/17s on my stock 2dr jk with 4.5 backspaced wheels and had zero issues with rubbing, the only time I actually got any rub was when I disco'd the swaybars and got some major flex going on. If you run a 265/70 you will definitely have more than enough room with a stock setup on aftermarket wheels.
Found some 295 70r 18 Nitto grapplers I want to get my hands on after I wear my current set out.
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Old 10-18-2010, 04:42 PM   #26
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My 07 Sport came with the upgraded size 255/75/R17 and they are supposed to be 32" tall. They look good and beefy too. Only thing is the stock GY SR-A tire sucks in the snow in 2wd...I will be getting either Goodyear Silent Armors or Firestone Destination A/T tires before the snow flies this year...both are good looking and highly rated tires with excellent highway ride.
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Old 10-18-2010, 05:43 PM   #27
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Found some 295 70r 18 Nitto grapplers I want to get my hands on after I wear my current set out.
Thats what I am running right now except mine are 17's....they have more than enough sidewall to air down properly, Ive had mine down to 12psi and had no issues even in extremely rough rock gardens. Cant be a 10ply sidewall on an A/T tire.
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Old 10-18-2010, 05:51 PM   #28
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Thats what I am running right now except mine are 17's....they have more than enough sidewall to air down properly, Ive had mine down to 12psi and had no issues even in extremely rough rock gardens. Cant be a 10ply sidewall on an A/T tire.
You gotta lift? You gotta bigger pic of your Jeep?

If you see how small my 265's look under the fenders I'd think 295's would be a nice snug fit.
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Old 10-18-2010, 05:52 PM   #29
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35" trail grapplers with 2.5" budget boost.
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Old 10-18-2010, 07:17 PM   #30
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35" trail grapplers with 2.5" budget boost.
Love the tread design but I'll have to stay in the 33" range.

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