Stock Tires Wear Out 255/75/17 Jeep JK Wrangler - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > JK Jeep Wrangler Forum > JK General Discussion Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 08-05-2012, 03:14 PM   #1
Jeeper
 
Join Date: May 2011
Posts: 77
Stock Tires Wear Out 255/75/17 Jeep JK Wrangler

When the tires finally wear out I was thinking of going to 285/70/17. Well I just figured out in english what size that is compaired to the 255. 255=32" approx. & 285=35" approx. Now I am wondering about the weight difference? 255/75/17 w/rim approx 80lbs? What would a 285/70/17 +/rim weight? & would that weight be to much for the rear gate? I am not wanting to replace the rear bumper @ this time. TIA

joemaxtravbran is offline   Quote Quick Reply
Old 08-05-2012, 03:59 PM   #2
Jeeper
 
mgola27's Avatar
 
Join Date: Jul 2010
Posts: 529
Quote:
Originally Posted by joemaxtravbran View Post
When the tires finally wear out I was thinking of going to 285/70/17. Well I just figured out in english what size that is compaired to the 255. 255=32" approx. & 285=35" approx. Now I am wondering about the weight difference? 255/75/17 w/rim approx 80lbs? What would a 285/70/17 +/rim weight? & would that weight be to much for the rear gate? I am not wanting to replace the rear bumper @ this time. TIA
Whoa there. You're a bit off.

There are many threads which will help you figure out what the numbers mean, and how large of a tire you can fit:

I'm lost on wheels and tires

Largest tire on stock JK? Here's your answer!

Tire Dimensions Made Simple - Discount Tire


But here's the skinny just to get you more on the right track:

The 255 refers to the width, which in your case does equate to a 32" tire. However if you ran a 255/50R17, that would NOT be a 32" tire, even though it's still a 255.

First number (255) = tire width in millimeters
Second number (75) = percentage of that width for the sidewall height
Third number (17) = diameter of the opening for the wheel

A 275/70R17 is also a 32" tire. It's just wider and the sidewall percentage is smaller. This mathematically works out to a tire which is wider, but has the same sidewall height as the 255/75R17.

So, so if you wish to run a 285/70/17 (which MANY do), you're essentially going up to a 33" not a 35" tire.

285 x 70 = 199.5mm (one sidewall height)
199.5 x 2 = 399 mm (two sidewall heights)
399mm = 15.7087" (total sidewall in inches)
15.7087 + 17 = 32.7087 (total tire/wheel height)

As far as the weight goes, I think the 285 with stock Rubicon wheel will work fine on your tailgate, but you might want to consider different bumpstops to ensure the wheel stays tight against the carrier.

Be sure to read the threads linked above and ask more questions, but at the end of the day, a 285/70/17 is a fine tire to run on stock wheels with stock suspension (for the most part). That 285 will rub slightly when turning and/or flexing. That will also be covered in the other threads.

mgola27 is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



logo carid shop wrangler parts carid fender flares custom wheels store avs deflectors at carid
» Rates
Get low rates on auto insurance in Canada!

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 03:37 AM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC