Taller tires = better MPG? - Fuelly Forums

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

Reply
 
Thread Tools Display Modes
 
Old 12-20-2006, 03:06 PM   #1
Registered Member
 
Join Date: Feb 2006
Posts: 5
Country: United States
Taller tires = better MPG?

Greetings,

I had a question for you MPG folks. I have a manual transmission car that runs over 3k RPM when I am going 75mph (I drive 180 miles a day on the highway). Would changing to a taller tire lower my RMPs and give me better MPG?
__________________

BeoWolfe is offline   Reply With Quote
Old 12-20-2006, 03:09 PM   #2
FE nut
 
diamondlarry's Avatar
 
Join Date: Sep 2005
Posts: 1,020
Country: United States
Quote:
Originally Posted by BeoWolfe
Greetings,

I had a question for you MPG folks. I have a manual transmission car that runs over 3k RPM when I am going 75mph (I drive 180 miles a day on the highway). Would changing to a taller tire lower my RMPs and give me better MPG?
It could give slightly better mileage. The only drawback would be that your odometer/speedometer would be off.
__________________

__________________
Horsepower is how hard you hit the wall, torque is how much of the wall you take with you.

2007 Prius,



Team Slow Burn
diamondlarry is offline   Reply With Quote
Old 12-20-2006, 03:54 PM   #3
Supporting Member
 
Hockey4mnhs's Avatar
 
Join Date: Dec 2006
Posts: 760
Country: United States
i would think not because there is probly more tire hiting the ground
__________________
Hockey4mnhs is offline   Reply With Quote
Old 12-20-2006, 04:05 PM   #4
|V3|2D
 
thisisntjared's Avatar
 
Join Date: Mar 2006
Posts: 1,186
Country: United States
Send a message via AIM to thisisntjared
Quote:
Originally Posted by diamondlarry
The only drawback would be that your odometer/speedometer would be off.
exactly, so you wouldnt really know if you were getting better mpg. narrower (lower rolling resistance) tires are better for fuel economy.
__________________
don't waste your time or time will waste you
thisisntjared is offline   Reply With Quote
Old 12-20-2006, 04:25 PM   #5
Registered Member
 
Join Date: Oct 2006
Posts: 245
Country: United States
They would lower your rpm's somewhat and that in theory shoudl help with milega ebut would be a small change. unless you get tires 2-3" taller
__________________
"Sylvie" 2000 Honda Insight 5 Speed


LxMike is offline   Reply With Quote
Old 12-20-2006, 05:06 PM   #6
Registered Member
 
MetroMPG's Avatar
 
Join Date: Dec 2005
Posts: 4,223
Country: United States
Quote:
unless you get tires 2-3" taller
Which would of course make aerodynamics worse, possibly cancelling the benefit of lower engine RPM (Of course you could try to go taller, but narrower...)

Dropping my engine RPM by 25% with the transmission swap, I got a 5% increase in MPG in top gear.
MetroMPG is offline   Reply With Quote
Old 12-20-2006, 05:12 PM   #7
*shrug*
 
Join Date: Sep 2005
Posts: 6,195
Country: United States
Tell us more about the car and we can prolly give you better suggestions. I vote for aero mods at this point.
SVOboy is offline   Reply With Quote
Old 12-20-2006, 06:12 PM   #8
|V3|2D
 
thisisntjared's Avatar
 
Join Date: Mar 2006
Posts: 1,186
Country: United States
Send a message via AIM to thisisntjared
Quote:
Originally Posted by SVOboy
I vote for aero mods at this point.
i agree but i think it depends more on the type of driving done than the car...
__________________
don't waste your time or time will waste you
thisisntjared is offline   Reply With Quote
Old 12-20-2006, 06:59 PM   #9
*shrug*
 
Join Date: Sep 2005
Posts: 6,195
Country: United States
Quote:
Originally Posted by thisisntjared
i agree but i think it depends more on the type of driving done than the car...
He said 75mph 180 miles a day.
SVOboy is offline   Reply With Quote
Old 12-21-2006, 12:03 PM   #10
Registered Member
 
Join Date: Oct 2005
Posts: 682
Country: United States
Narrower tires of the same height would provide a definite aero improvement. Go with a low rolling resistance brand, and inflate to the maximum sidewall rating. Did he say what size tire he's running?
__________________

__________________
Capitalism: The cream rises. Socialism: The scum rises.
Sludgy 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
Not very precise mpg calculation larjerr Fuelly Web Support and Community News 4 08-20-2012 02:03 AM
Basic Stats poorboymeyer Fuelly Web Support and Community News 2 09-22-2009 09:19 AM
Keeping my distance in traffic khurt General Fuel Topics 8 09-07-2008 04:23 AM
Ability to comment on Fuel Tips randomic Fuelly Web Support and Community News 4 08-22-2008 12:25 AM
"active" aero grille slats on 06 civic concept MetroMPG General Fuel Topics 21 01-03-2006 01:02 PM

Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 06:24 PM.


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