How many MPG's off is my car because of slightly larger tires?? - Fuelly Forums

Android Users - Coming Soon! - Migrating from aCar 4.8 to 5.0

Go Back   Fuelly Forums > Fuel Talk > General Fuel Topics
Search Today's Posts Mark Forums Read Click Here to Login
Reply
 
Thread Tools Display Modes
 
Old 09-30-2007, 05:52 PM   #1
Registered Member
 
panamacolin's Avatar
 
Join Date: May 2007
Posts: 212
Country: United States
How many MPG's off is my car because of slightly larger tires??

Hey guys!

Just wondering how many mpg's my cars tripometer will be off because the VX stock tires are 165/70-13 and I am running 175/70-13...

Thanks in advance, everyone on here has been great!
__________________

__________________
panamacolin is offline   Reply With Quote
Old 09-30-2007, 06:14 PM   #2
Registered Member
 
mrmad's Avatar
 
Join Date: Mar 2007
Posts: 386
Country: United States
Here is a circumference calculator on discounttire.com. You might want to try to verify how accurate your odometer is overall. My CRX has 185/60/14s on it which should be about 4% larger in circimference then the stock 13 tires. I used Google Earth to measure about a 30 mile section on my commute to try to see if I was really getting 4% lower mpg then I was calculating, and it turned out the odometer was pretty much dead on with the 14" tires. I guess the stock odeometer is about 4% high.

http://www.discounttire.com/dtcs/infoTireMath.dos
__________________

mrmad is offline   Reply With Quote
Old 09-30-2007, 06:38 PM   #3
Registered Member
 
panamacolin's Avatar
 
Join Date: May 2007
Posts: 212
Country: United States
2.54%...is what it says...mind running running it for me to see if I did that correctly...

Thanks!
Colin
__________________
panamacolin is offline   Reply With Quote
Old 09-30-2007, 06:45 PM   #4
Registered Member
 
mrmad's Avatar
 
Join Date: Mar 2007
Posts: 386
Country: United States
Tire calculator says 165/70/13 has a circumference of 69.41 and 175/70/13 is 71.14. This is 1.73" more. 1.73/69.41 is 0.0249 or 2.49% more. The Sunday night football game must be pretty boring to make me want to calculate tire circumferences.
mrmad is offline   Reply With Quote
Old 09-30-2007, 10:49 PM   #5
Supporting Member
 
cfg83's Avatar
 
Join Date: Sep 2006
Posts: 1,779
Country: United States
panamacolin -

I used a GPS to calibrate/correct my odometer :

New shoes (aka tires)
http://www.gassavers.org/showthread.php?t=3699

CarloSW2
__________________
Old School SW2 EPA ... New School Civic EPA :

What's your EPA MPG? http://www.fueleconomy.gov/feg/calculatorSelectYear.jsp
cfg83 is offline   Reply With Quote
Old 10-01-2007, 06:58 PM   #6
Registered Member
 
panamacolin's Avatar
 
Join Date: May 2007
Posts: 212
Country: United States
cool, ill have to try the gps thing
__________________

__________________
panamacolin is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
New Feature: Loan and lease cost labrie Fuelly Web Support and Community News 1 02-08-2012 02:12 AM
Fuelly Android App - eehokie Fuelly Web Support and Community News 2 07-14-2010 09:59 PM
Basic Stats poorboymeyer Fuelly Web Support and Community News 2 09-22-2009 09:19 AM
DIY: Wire Tuck!!! SVOboy Experiments, Modifications and DIY 11 09-21-2006 05:17 AM
Condensator orevgym General Fuel Topics 0 07-23-2006 11:25 AM

Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 10:38 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.