Computer Speedometer fix for 18" wheels - Civinfo
LinkBack Thread Tools
post #1 of 4 (permalink) Old 8th March 2014, 12:44 Thread Starter
mladjan's Avatar
Car: '15 1.8 Sport / '07 FN2
Join Date: 29th September 2013
Location: Belgrade RS
Posts: 53
Thanks: 4
Thanked 6 Times in 6 Posts
iTrader: (0)
Speedometer fix for 18" wheels

Hi guys,

Now I have 18" alloy wheels, and I know that speedometer will not be accurate. There is a way to change some settings in ECU to be accurate?

Sent from my iPhone using Tapatalk
mladjan is offline  
Sponsored Links
post #2 of 4 (permalink) Old 8th March 2014, 12:45
stoney's Avatar
Car: 2007 FN2 GT
Join Date: 25th March 2010
Location: lisburn NORTHIRELAND
Posts: 10,524
Thanks: 227
Thanked 1,943 Times in 1,635 Posts
iTrader: (13)
Have you measured the rolling radius.

The stock speedo is inaccurate for this eventuality anyway
stoney is offline  
post #3 of 4 (permalink) Old 9th March 2014, 14:18
purekillforce's Avatar
Car: 2009 FN3
Join Date: 24th December 2013
Location: Lancashire, UK ENGLAND
Posts: 2,764
Thanks: 528
Thanked 596 Times in 515 Posts
iTrader: (6)
If you've kept the actual tyre size the same, they will be as accurate as they ever were.

Sent from my Galaxy Nexus using Tapatalk
purekillforce is offline  
post #4 of 4 (permalink) Old 9th March 2014, 15:50
Super Moderator
Grayfox's Avatar
Car: '11 Impreza R Special
Join Date: 1st February 2012
Location: NSW, Australia AU
Posts: 7,124
Thanks: 93
Thanked 1,011 Times in 891 Posts
iTrader: (0)
Eco display Eco display
You had 245/45/17
You should use 245/40/18

The speed error is not handled by the ECU as far as i am aware.

When i plug my ELM327 in and look at the Seed(OBD) live data it is the same as GPS speed.
Grayfox is offline  

  Civinfo > 8th Generation Euro Honda Civic (2006 - 2011) > Electronics (8G)

Quick Reply

Register Now

In order to be able to post messages on the Civinfo forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Your User Name is the name that appears by all your posts on the forum, and so should not be your email address.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


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 On
Pingbacks are On
Refbacks are On

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