Tire size and speedo error calculator - JeepForum.com
LinkBack Thread Tools
post #1 of 2 Old 10-28-2013, 09:50 PM Thread Starter
Registered User
2005 WK 
Join Date: Oct 2013
Location: Winterpeg
Posts: 45
Tire size and speedo error calculator

I am looking at getting some bigger tires and wanted to know the difference. I found these 2 calculators that give tell you the size differences between any 2 tires sizes. This may be a stickie.


This calculator even has a graphic display that shows you the size difference:


tok204 is offline  
Sponsored Links
post #2 of 2 Old 11-02-2013, 08:15 PM
Web Wheeler
1999 XJ Cherokee 
Join Date: Mar 2013
Posts: 5,977
How much bigger tires? I have found that going up 2" taller just makes the speedo more accurate. I found that to be the case on my LJ and my XJ.

Before you spend time, money, or effort figuring out any more about it, put on your larger tires (and do any regearing you plan to do), then use a GPS device (I used my smart phone with a GPS app) with a speedometer feature in it. This will tell you your actual speed in real time. Compare that to your speedometer to determine if it is incorrect, and if so, how much.

After that, look for a solution, if you need one. You might find you have no problem. If you do have a problem, it will be easier to fix when you know exactly how much it's off.

Warning: I often edit my posts a few times to get them complete or correct errors.
Charley3 is offline  

Quick Reply

Register Now

In order to be able to post messages on the JeepForum.com 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.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

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 On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome