Fuel Efficiency - Focus Fanatics
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace



Go Back   Focus Fanatics > Ford Focus Tech Discussions > Wheels & Tires - Sponsored By Tire Rack

Wheels & Tires - Sponsored By Tire Rack The place to go for answers on wheel types, tire sizes, offset, wheel patterns and more.
Sponsored By:
Tire Rack


Search This Forum | Image Search | Advanced Search    
FocusFest Ford Focus Tire & Wheels FocusFanatics Merchandise

Reply
 
Thread Tools Display Modes
Old 03-04-2013, 08:07 PM   #1
clayton89
Focus Enthusiast
 
Join Date: Jan 2013
Fan#: 108214
Location: Fort Dodge, IA
What I Drive: 2006 Sonic Blue ZXW

Posts: 98
FF Reputation: 1 clayton89 Good Standing Member
Buy-Sell-Trade Rating: (0)
Fuel Efficiency

My friend has found a pretty good deal on a set of OZ ultraleggeras 16 x 7 and he currently has 15 inch steelies. He was curious if the increase in contact patch of the tire going from 185 - 205 will offset the increase mpg factor of having lightweight wheels of approx 5lbs lighter?

Thanks for your comments

Edit: He has a 05 4 door focus


clayton89 is online now  
    Reply With Quote
Sponsored Links
Advertisement
 
Old 03-04-2013, 08:28 PM   #2
bringler26
FUBARCUS
 
bringler26's Avatar
 
Join Date: Oct 2008
Fan#: 59705
Location: Mentor, OH
What I Drive: 03 ZX3 & 07 Impreza 2.5i

Posts: 5,657
FF Reputation: 29 bringler26 Great Standing Member
Buy-Sell-Trade Rating: (5)
It may but most likely it would be negligible.

as an example I went from 16" wheels with 205/55/r16 tires to 17" wheels with 225/45/r17 on my Subaru and actually got better fuel economy because the wheel and tire combo was lighter than the original size.
__________________
2003 Ford Focus ZX3("FUBARCUS" was "Brokus") - old and still busted
2007 Subaru Impreza 2.5i - current DD
Quote:
Originally Posted by zetecDon View Post
I always moderate naked!
bringler26 is offline  
    Reply With Quote
Old 03-04-2013, 09:54 PM   #3
clayton89
Focus Enthusiast
 
Join Date: Jan 2013
Fan#: 108214
Location: Fort Dodge, IA
What I Drive: 2006 Sonic Blue ZXW

Posts: 98
FF Reputation: 1 clayton89 Good Standing Member
Buy-Sell-Trade Rating: (0)
That was my thought, but I am guessing that the stock steel wheels weigh like 20 lbs plus the weight of the tires. So my guess would be that the 16 inch tires would weigh about the same maybe less, But I do believe that saving 5lbs per wheel will be very beneficial for mpgs.
clayton89 is online now  
    Reply With Quote
Old 03-04-2013, 11:13 PM   #4
bringler26
FUBARCUS
 
bringler26's Avatar
 
Join Date: Oct 2008
Fan#: 59705
Location: Mentor, OH
What I Drive: 03 ZX3 & 07 Impreza 2.5i

Posts: 5,657
FF Reputation: 29 bringler26 Great Standing Member
Buy-Sell-Trade Rating: (5)
It depends on the tires really. My 16" tires around 25lbs each and my 17" tires are about 20lbs each. The wheel weights I do not know off hand but i had looked the weight of my tires on tirerack.
__________________
2003 Ford Focus ZX3("FUBARCUS" was "Brokus") - old and still busted
2007 Subaru Impreza 2.5i - current DD
Quote:
Originally Posted by zetecDon View Post
I always moderate naked!
bringler26 is offline  
    Reply With Quote
Old 03-05-2013, 03:48 PM   #5
clayton89
Focus Enthusiast
 
Join Date: Jan 2013
Fan#: 108214
Location: Fort Dodge, IA
What I Drive: 2006 Sonic Blue ZXW

Posts: 98
FF Reputation: 1 clayton89 Good Standing Member
Buy-Sell-Trade Rating: (0)
just looking on tire rack at a few tires it looks that the 16 inch tires are around 20lbs versus 15 inch tires are around 18lbs
clayton89 is online now  
    Reply With Quote
Old 03-05-2013, 03:56 PM   #6
clayton89
Focus Enthusiast
 
Join Date: Jan 2013
Fan#: 108214
Location: Fort Dodge, IA
What I Drive: 2006 Sonic Blue ZXW

Posts: 98
FF Reputation: 1 clayton89 Good Standing Member
Buy-Sell-Trade Rating: (0)
OK looking at a post on the forum from Julian at Tire Rack stated that theirs are like 19lbs a piece shown here and over on this discussion it looks like the factory may weigh 20.5 lbs (figuring a 18lb tire 38.5 - 18 = 20.5) do you guys think that a total weight loss of wheel weight 5lbs plus the 2lb gain in tire and greater contact patch width would hurt gas mileage or hardly be noticeable?
clayton89 is online now  
    Reply With Quote
Old 03-05-2013, 04:03 PM   #7
wrc_fan
slow
 
wrc_fan's Avatar
 
Join Date: Aug 2004
Fan#: 11913
Location: Greenville, SC
What I Drive: 03 ZX3 Duratec 08 WRX Hatch

Posts: 1,709
FF Reputation: 23 wrc_fan Great Standing Member
Buy-Sell-Trade Rating: (0)
don't forget the aero impact :D
__________________
Parking Lot Hero
2008 WRX daily driver
2003 ZX3 23D Autox Car 42 FSP

"Hella Functional - Raced, Not Hard Parked"
wrc_fan is offline  
    Reply With Quote
Old 03-05-2013, 04:21 PM   #8
clayton89
Focus Enthusiast
 
Join Date: Jan 2013
Fan#: 108214
Location: Fort Dodge, IA
What I Drive: 2006 Sonic Blue ZXW

Posts: 98
FF Reputation: 1 clayton89 Good Standing Member
Buy-Sell-Trade Rating: (0)
I know lol. I just know I have seen a few people here complain about their mileage based on increasing wheel sizes, but usually they all increase the width of the tire. I have seen a few people say that with the increase in contact patch will increase friction with road surface leading to less MPGs
clayton89 is online now  
    Reply With Quote
Old 03-05-2013, 04:44 PM   #9
felixthecat
Focus Fanatic
 
felixthecat's Avatar
 
Join Date: Nov 2010
Fan#: 80663
Location: Renton, WA
What I Drive: '05 Silver Sport Technologies

Posts: 7,991
FF Reputation: 52 felixthecat Great Standing Member
Buy-Sell-Trade Rating: (0)
Quote:
Originally Posted by clayton89 View Post
I know lol. I just know I have seen a few people here complain about their mileage based on increasing wheel sizes, but usually they all increase the width of the tire. I have seen a few people say that with the increase in contact patch will increase friction with road surface leading to less MPGs
Thats where friction comes in= more friction= more stick. Get mpg eco type tires & you'll loose friction but have better mpg.
__________________
Introduce Mr. Torsen to the mix D23 crew- D-Tech- Sedan Revolution= #131
felixthecat is offline  
    Reply With Quote
Old 03-05-2013, 05:25 PM   #10
Levi05
Focus Enthusiast
 
Levi05's Avatar
 
Join Date: Aug 2011
Fan#: 89386
Location: Salt Lake, UT
What I Drive: 2005 Liquid Gray ST

Posts: 96
FF Reputation: 1 Levi05 Good Standing Member
Buy-Sell-Trade Rating: (0)
If you do some deep research, you will find that wider tires will typically have less rolling resistance. And going to a wider tire doesnt increase the contact patch but only changes the shape of the contact patch (if tire pressures remain the same as before).

It gets complicated but simple answer is a wider tire alone wont hurt fuel mileage. Wheel weight and tire compound/tread design have a bigger impact.

Go to autospeed.com and lookup an article called "tyres, grip, and all that..." <- explains everything. Haha.

Last edited by Levi05; 03-05-2013 at 05:33 PM. Reason: better word choice
Levi05 is offline  
    Reply With Quote
Reply

Bookmarks & Social Networks

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

Forum Jump


All times are GMT -5. The time now is 08:10 PM.


Copyright 2002-2014 FocusFanatics.com. All Rights Reserved : Terms of Use : Privacy Policy : Advertise Information : Site Map

Focus Fanatics Ford Focus Forum offers many fun ways for you to engage with other Ford Focus Owners from across the world. Whether it be about the aftermarket performance modifications, technical how-to's, European tuned suspension or awesome fuel economy similar to the Acura TLX or Fiesta ST. You can find all Ford Focus and Focus ST related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area.