Jeep Wrangler Forum banner

1 - 20 of 33 Posts

·
Registered
Joined
·
87 Posts
Discussion Starter #1
Hello what is the widest tire I can put on a 18" stock rim? I believe the width is 7.5". I have 255 now. Can I go 265, 275, 295? Thanks for you help!
 

·
Registered
Joined
·
20 Posts
The numbers you listed is for height. 265/70/18 the 70 is width. And that size listed is what I have it rubs a little when turned to the max on either side.
 

·
Registered
Joined
·
87 Posts
Discussion Starter #4
I thought 265 was the width and 70 is the side wall profile? Maybe im wrong. What is the tire name you have in the 265/70? Im looking for a wider more aggressive tire to put on stock 255/70/18.

The numbers you listed is for height. 265/70/18 the 70 is width. And that size listed is what I have it rubs a little when turned to the max on either side.
 

·
Registered
Joined
·
1 Posts
You are correct, the 265 is the width of the tire in mm, the 70 is the aspect ratio and determines the Sidewall height based on the width of the tire.
 

·
Registered
Joined
·
16,641 Posts
You are correct, the 265 is the width of the tire in mm, the 70 is the aspect ratio and determines the Sidewall height based on the width of the tire.
GREAT first post :thumb:. WELCOME TO WF :wavey:
 

·
Registered
Joined
·
87 Posts
Discussion Starter #7
So if my stock rim is 7.5, what is the max width I can go? 265, 275, 285? Without a lift. Thanks
You are correct, the 265 is the width of the tire in mm, the 70 is the aspect ratio and determines the Sidewall height based on the width of the tire.
 

·
Registered
Joined
·
569 Posts
Not sure what tire you're looking for, but here are the sizes available from BF Goodrich in the All Terrain T/A KO for an 18" rim:

265/65R18 = 31.6x10.4/18
275/65R18 = 32.1x10.8/18
275/70R18 = 33.2x10.8/18
285/65R18 = 32.6x11.2/18
305/65R18 = 33.6x12.0/18
325/65R18 = 34.6x12.8/18

I know people put 12.5" wide tires on 8" wide rims all the time, so I'm sure you'd be fine with anything 12" or less in width. I'd say go with the 305/65R18.
 

·
Grampie
Joined
·
783 Posts
A good question! I have the same wheels and tires you do. The 255x70/18 = 32x10/18. Unless you want to do an speedometer recalibration (or don't care) stick as close to the 32" dia as possible. The width is another question. You may have to find a friendly tire shop willing to mount a tire and help you fit it. back in my racing days that's what we did for a quick answer. Taller tires will have more side wall deflection, thus clearance issues with body and chassis parts. Only experience will help answer that question. The 255x70/18's are an odd size and many of us (who want to use the stock wheels) will face this question in the future.
 

·
Registered
Joined
·
16,641 Posts
Not sure what tire you're looking for, but here are the sizes available from BF Goodrich in the All Terrain T/A KO for an 18" rim:

265/65R18 = 31.6x10.4/18
275/65R18 = 32.1x10.8/18
275/70R18 = 33.2x10.8/18
285/65R18 = 32.6x11.2/18
305/65R18 = 33.6x12.0/18
325/65R18 = 34.6x12.8/18

I know people put 12.5" wide tires on 8" wide rims all the time, so I'm sure you'd be fine with anything 12.5" or less in width. I'd say go with the 285/65R18.
Fixed :thumb: as anything over 33" without lift is not a good idea IMO even if it's just a tiny bit. Also room for flex is good news
 

·
Registered
Joined
·
135 Posts
The numbers you listed is for height. 265/70/18 the 70 is width. And that size listed is what I have it rubs a little when turned to the max on either side.

to read a metric tire size... 265/70/18

265 = 265mm in width (265/25.4 = 10.43 inches in width)

70 = this is the distance from the wheel to the tread. It is 70% of the 265mm width (265*0.7= 185.5mm)(185.5/25.4=7.3 inches of sidewall) (7.3in sidewall times 2 plus the 18in wheel = 32.6 in tall)

18= wheel size
 

·
Premium Member
Joined
·
233 Posts
Should my BS detector be going off?

I have a bone stock 2012 JK Unlimited Sahara. A local shop is telling me that you can do a one-inch leveling kit on the JKU, which picks up the front enough to fit 275 65 18 Goodyear Duratracs (33.1") tires all the way around with no binding or rubbing at full lock and max compression. Should my BS detector be going off?! :confused:
 

·
Registered
Joined
·
87 Posts
Discussion Starter #13
IDK. Im getting 275/65/18 DuraTracs installed Saturday on stock 18" Sahara rim. No lift no spacers (yet, we'll see if they rub)


I have a bone stock 2012 JK Unlimited Sahara. A local shop is telling me that you can do a one-inch leveling kit on the JKU, which picks up the front enough to fit 275 65 18 Goodyear Duratracs (33.1") tires all the way around with no binding or rubbing at full lock and max compression. Should my BS detector be going off?! :confused:
 

·
Registered
Joined
·
16,641 Posts
I have a bone stock 2012 JK Unlimited Sahara. A local shop is telling me that you can do a one-inch leveling kit on the JKU, which picks up the front enough to fit 275 65 18 Goodyear Duratracs (33.1") tires all the way around with no binding or rubbing at full lock and max compression. Should my BS detector be going off?! :confused:
IDK. Im getting 275/65/18 DuraTracs installed Saturday on stock 18" Sahara rim. No lift no spacers (yet, we'll see if they rub)
My calculator has 275/65/18 at 32x11/18. Those will rub with stock rims
 

·
Premium Member
Joined
·
233 Posts
My calculator has 275/65/18 at 32x11/18. Those will rub with stock rims
XJ Knight -- Thanks, appreciate the knowledge. Would the 2-inch lift-level fix that? Or just a 1 1/2" Spidertrax? Trying to keep things economical, you know.

Sahara33 -- Would you please report back on the Duratrac install Saturday? Thanks.
 

·
Registered
Joined
·
16,641 Posts
XJ Knight -- Thanks, appreciate the knowledge. Would the 2-inch lift-level fix that? Or just a 1 1/2" Spidertrax? Trying to keep things economical, you know.

Sahara33 -- Would you please report back on the Duratrac install Saturday? Thanks.
as to the 2in lift that only will help with clearing tire height not width and the 275/65/18's being 32's you can clear at stock height with room to spare. The wheel spacers will push the wheels out and that is what will help you in this case cause the max width on the stock rims you can run without rubbing is 10.5in and that will be close. However on that note Im of the opinion that wheel spacers are bad news as they just add to the stress of wheel hubs and other steering components. Don't take short cuts get new wheels with the proper back spacing and be done with it.. Also most tire places won't touch a vehlicle with wheel spacers on them.

But I must also add so that those with wheel spacers don't come after me with angry posts, if maintained and torqued right checked regularly they will work just fine as if no one else "jimbox" here on WF has proven.. He does run them and Im not sure anyone uses there Jeep offroad more then he does.
 

·
Premium Member
Joined
·
233 Posts
as to the 2in lift that only will help with clearing tire height not width and the 275/65/18's being 32's you can clear at stock height with room to spare. The wheel spacers will push the wheels out and that is what will help you in this case cause the max width on the stock rims you can run without rubbing is 10.5in and that will be close. However on that note Im of the opinion that wheel spacers are bad news as they just add to the stress of wheel hubs and other steering components. Don't take short cuts get new wheels with the proper back spacing and be done with it.. Also most tire places won't touch a vehlicle with wheel spacers on them.

But I must also add so that those with wheel spacers don't come after me with angry posts, if maintained and torqued right checked regularly they will work just fine as if no one else "jimbox" here on WF has proven.. He does run them and Im not sure anyone uses there Jeep offroad more then he does.
Thanks for that. I didn't know that 10.5" was the width limit. I'd rather not get into wheel spacers for the above reasons.

Okay, so how does this sound: 17" rims (Pintlers, maybe?), GY Duratrac 285/70/17s (33"), and a 1-2 inch lift-level? Followed by an OEM yard sale, and chased by lots of vodka on install day.

This is a DD, 10 percent fire trails, gravel in the woods.

Thanks, I really appreciate your opinion. There's too much money at play in this whole thing to do it more than once.
 

·
Registered
Joined
·
16,641 Posts
Thanks for that. I didn't know that 10.5" was the width limit. I'd rather not get into wheel spacers for the above reasons.

Okay, so how does this sound: 17" rims (Pintlers, maybe?), GY Duratrac 285/70/17s (33"), and a 1-2 inch lift-level? Followed by an OEM yard sale, and chased by lots of vodka on install day.

This is a DD, 10 percent fire trails, gravel in the woods.

Thanks, I really appreciate your opinion. There's too much money at play in this whole thing to do it more than once.
Love it! Especially the lots of vodka.. ideally you'll want a rim with 4.5in of backspacing but anything from 3.75-4.5 should work just fine
 

·
Registered
Joined
·
87 Posts
Discussion Starter #19
Sure will do. I've read some say they dont rub and some say do rub. I will let you know.

XJ Knight -- Thanks, appreciate the knowledge. Would the 2-inch lift-level fix that? Or just a 1 1/2" Spidertrax? Trying to keep things economical, you know.

Sahara33 -- Would you please report back on the Duratrac install Saturday? Thanks.
 

·
Premium Member
Joined
·
233 Posts
Sure will do. I've read some say they dont rub and some say do rub. I will let you know.
Thanks, S33. FYI, my local Discount Tire guy says he'll order whatever tire you want, fit the tire on one wheel, then remount it to each hub so they can eyeball it to make sure they don't rub. If they do rub, no harm no foul, they'll remount your old tire, put the other tires back on the car, and you're on your way. Might be the way to go, instead of mounting all 4 just to see if there's a problem.
 
1 - 20 of 33 Posts
Top