MPG conversion -
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back > General Technical Discussions > Tires & Wheels > MPG conversion

FS: Jeep Fog Light LED Bulbs! Several Brightness Options! *STOP UNWANTED LIGHT BAR NOISE* with Pandemic LED Light BaRuffstuff 10 year sale

Unread 08-14-2010, 01:20 PM   #1
Registered User
1987 YJ Wrangler 
Join Date: May 2009
Location: Fort Collins, CO
Posts: 3
MPG conversion

Can anyone tell me what the factory wheel/tire size for the '87 YJ was? I am trying to figure out my MPG more accurately since I have 33s on the YJ now. I need to do a little math if anyone can help me out with an answer.


Matthew00 is offline   Reply With Quote Quick reply to this message
Unread 08-17-2010, 02:37 PM   #2
UncleWilson's Avatar
2006 LJ Wrangler 
Join Date: Jul 2010
Location: SE Michigan
Posts: 330 ---> Jeep--->1987--->Wrangler

Original Equipment Size 1: 205/75-15

Original Equipment Size 2: 215/75-15

Original Equipment Size 3: 225/75-15
2006 LJ Rubi JKS BL/MML, Curries Arms, 3", UCF Skids, Riddler, 35 GY MTR W/K, Black Rock 909's, Black Magic, Rokmen Sliders, Savvy GTS, Cloaked, 4.88
TJ Alignment Videos
Currie Control Arms Install Tips

UncleWilson is offline   Reply With Quote Quick reply to this message
Unread 08-17-2010, 05:52 PM   #3
Registered User
2013 JK Wrangler 
Join Date: Apr 2010
Location: Mobile, AL
Posts: 1,279
205/75-15 is 27.1
225/75-15 is 28.3

8 inch wide tires. I cant remember which one came on which packages, chances are smaller to 4 cylinder. with the larger on the 6, and biggest on the renegade or sahara or sport package.

Just to toss it out there, you can check on your axle gearing and get the speedometer adjusted as well.
Demp is offline   Reply With Quote Quick reply to this message

gas mileage , tire size

Quick Reply

Register Now

In order to be able to post messages on the forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.

Email Address:


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

Suggested Threads

Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. is not in any way associated with Jeep or the Chrysler Corp.