Go Back   MustangForums.com > Ford Mustang Tech > 2005 - 2014 Mustangs > S197 Handling Section
Sign in using an external account
Register Forgot Password?
Search


S197 Handling Section For everything suspension related, inlcuding brakes, tires, and wheels.

Welcome to Mustang Forums!
Welcome to Mustang Forums.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Reply
 
 
 
 
Thread Tools Search this Thread
Old 05-17-2009, 08:45 PM   #1
Darth Evader
1st Gear Member
 
Join Date: Sep 2007
Vehicle: 2006 Ford Mustang GT
Location: Indiana
Posts: 61
Default Benefits of 18/19" vs 17" Wheels?

Other than appearance reasons, is there a benefit of using a larger 18 or 19" wheel vs a 17"? I'm just curious why all of the new cars (Mustangs/Camaros, etc) are being equipped with larger, heavier wheels.

Thoughts?
This ad is not displayed to registered or logged-in members.
Register your free account today and become a member on Mustang Forums!
__________________

2006 Mustang GT - Vista Blue
Darth Evader is offline   Reply With Quote
Old 05-17-2009, 08:58 PM   #2
Legion5
5th Gear Member
 
Join Date: Aug 2006
Vehicle: Saleen Thinger, Vert, Bike, Magic Pumpkin.
Location: Near Wash. DC Posts: 13,541
Posts: 2,497
Default

40-45 profile is approximately the ideal sidewall stiffness of a sports car. Anything over that has a tire that flexes too much naturally. The Mustang with 19" wheels has 45 profile tires, so does the Camaro (45 & 40 ), so does the mustang with 18" wheels (45). So does the mustang with 20s (40 rear)

These actually provide some performance benefit on a clean smooth street at the cost of reduced performance on gravel and bad roads etc.

However the larger wheels on passenger cars started out as a trend for looks having nothing to do with performance and ended up luckily putting most sports cars with ideal tire sizes by accident. Very high end sports cars like BMWs and Mercedes actually use 35 profile tires now which hurt the performance rather than help it thanks to the trend for larger wheels.

Larger wheels were originally put on sports cars to clear larger brakes but what I'm saying is that they don't hurt performance in our cars and it's competitors. The wheel weight is an issue but on a street car it's not that important because there are 20" wheels that are lighter than 16" wheels, the steeda 20s for example or the Saleen forged 5 wheels which are also light wheels. so it depends on if you choose a cheap heavy big wheel or a light one more than anything in terms of weight.
__________________

Last edited by Legion5; 05-17-2009 at 09:09 PM.
Legion5 is offline   Reply With Quote
Old 05-17-2009, 09:30 PM   #3
Darth Evader
1st Gear Member
 
Join Date: Sep 2007
Vehicle: 2006 Ford Mustang GT
Location: Indiana
Posts: 61
Default

Great info Legion5, thanks!
__________________

2006 Mustang GT - Vista Blue
Darth Evader is offline   Reply With Quote
Old 05-18-2009, 12:26 AM   #4
Texotic
5th Gear Member
 
Join Date: Aug 2007
Vehicle: 2005 Mustang GT
Location: College Station, TX
Posts: 2,179
Default

Like Legion5 said, the 18's or larger on these cars are required to clear Big Brake Kits.
__________________
2005 Satin Silver GT Manual
Euromax 612's w/ Nitto NT555's
Tunable Induction/XCAL2/93 Tune
Steeda Rear Swaybar & G-Trac Brace
Corsa's
Sequentials
Waiting to be installed: BMR Adj. Street Combo LCA's
Texotic is offline   Reply With Quote
Old 05-18-2009, 04:51 AM   #5
Diabolical!
5th Gear Member
 
Diabolical!'s Avatar
 
Join Date: Jul 2006
Vehicle: 2006 Mustang GT
Location: New Orleans
Posts: 4,495
Default

In my experience, my 18" fanblades were good for costing me 2/10ths of a second at the drag strip. I dumped them for a set of stock 17"s and couldn't be happier.
__________________

Whipple-12psi 10 Rib Pulley Kit-McLeod RXT & Steel Flywheel-UPR Rod End LCAs, UCA, Spherical Bearing, Panhard Bar, K-member + Front Swaybar Delete-Metco LCA Relo Brackets-BMR Xtreme Anti Roll-Spydershaft-Race Star Wheels-MGW-PMP Line Locks-Stanghi O/R X-Odyssey 10 lb Battery-Moroso Separator-Eibach Front/CJ Rear Drag Springs-Strange Adjustable Shocks and Struts-MSD 2 Step-etc. 11.29@123 1.59 60'
DRAG RACE? ASK ME ABOUT MY UPR SUSPENSION.
Diabolical! is offline   Reply With Quote
Old 05-18-2009, 09:35 AM   #6
Argonaut
4th Gear Member
 
Argonaut's Avatar
 
Join Date: Oct 2007
Vehicle: 2007 GT
Location: Harrisburg PA
Posts: 1,778
Default

On race tracks a lot of guys favor the 17" over the 18" simply because of the cost of tires, at least that has been the conventional wisdom. But I think its changing. Several racing series are now using 18" and its getting easy to find 18" scrubs for $50 - 100 each. Plus - if you want/need bigger brakes you'll need the 18s.
__________________
07 GT 5spd: stock
99 C5 FRC: track toy
Argonaut is offline   Reply With Quote
Old 05-18-2009, 11:09 AM   #7
Sleeper_08
4th Gear Member
 
Sleeper_08's Avatar
 
Join Date: Dec 2007
Vehicle: 08 Mustang GT
Location: Ontario, Canada
Posts: 1,692
Default

I just had a look at the specs for Porsches USA and they fit 235/35 ZR 19 front, 305/30 ZR 19 rear on the GT3 and Turbos and it says the Turbo rims are Forged alloy 8.5J x 19 ET 56 front, 11J x 19 ET 51 rear. It looks like their reason for going to 19s is the brakes since on the Turbo it says -

"A range of optional 18- and 19-inch winter wheels (all snow chain-compatible) are available from Porsche Tequipment. Vehicles equipped with the optional Porsche Ceramic Composite Brake (PCCB) may only be fitted with the larger 19-inch winter wheels."

It would be interesting to see a Turbo with snow chains
__________________
White 08 GT Roush S/C 445 HP/Michelin Pilot Super Sports 285/35/18 tires/18 x 9.5 Enkei PF01 wheels/Steeda Comp springs/Koni Yellows/FAYS2 Watt's Link/LCA/Adj UCA & Mnt/Upper strut mnts/GT500 Brembo Brake Kit/GT500 Front LCA/X5 Ball Jnt/Bmp Str + more
Sleeper_08 is offline   Reply With Quote
Old 05-18-2009, 04:38 PM   #8
mustangtestuser
2nd Gear Member
 
Join Date: Nov 2008
Vehicle: 2006, Ford, Mustang
Location: Va
Posts: 171
Default

Quote:
Originally Posted by nineinchnail1024 View Post
In my experience, my 18" fanblades were good for costing me 2/10ths of a second at the drag strip. I dumped them for a set of stock 17"s and couldn't be happier.
I have the 17 inch wheels from the factory, however, I wanted to run a wider tire. 255/50R17 will work, but there are just so few tires offered in that size. It's a real oddball. I was pretty much forced to go with 18 inch wheels in order to fit 255/45R18. Tires in that size are more plentiful, generally lighter and usually the same cost, if not cheaper, than 255/50R17, after all.

The biggest problem is the weight. The 18 inch fan blades you mentioned weigh 26.5 lbs each! The 17 inch machined aluminum wheels are about 22 lbs each. Total weight with the stock 235/55R17 tires is about 50 lbs each. When you take into account the tires (maybe an additional 2 lbs or so), you're probably looking at an extra 6.5 lbs per wheel! That's a lot of extra rotating mass.

The only solution are light weight wheels. I have some 18 inch OZ Racing wheels that should be here soon. Total weight is 19 lbs per wheel. Total tire weight for the BFGoodrich g-froce T/A KDW 2 tires I ordered are 29 lbs per tire. That should mean a combined weight of 48 lbs. That's two pounds less than the stock wheels and tires with the same overall diameter while still running a wider tire!

The big downside is expense. Cost for the wheels and the tires was $2k, that's with a 17% discount on the wheels from Tire Rack. I hope it's worth it...
__________________
2006 Mustang GT
5 Speed Auto
NOS Single Port Wet Nitrous Kit (75 shot)
93 Octane tune from Bama Chips
FRPP 3.73:1 Gears
Steeda Intake
Steeda LCA/Eibach Sway Bars
FRPP "Stinger" Axle Back Exhaust
BBK Shorty Headers
19 lbs OZ Racing Wheels with 255/45R18 Tires

Daily Driver: 2009 Pontiac G8 GT

Last edited by mustangtestuser; 05-18-2009 at 04:44 PM.
mustangtestuser is offline   Reply With Quote
Old 05-18-2009, 07:17 PM   #9
Rubrignitz
5th Gear Member
 
Rubrignitz's Avatar
 
Join Date: Jul 2007
Vehicle: 2007 Mustang GT Coupe
Location: TX
Posts: 4,897
Default

I'll gladly sacrifice a few lbs rotating weight with the hp these cars output for the extra meat on the road. With my 275/40's fr and 305/35's rear (and the sticky DR rubber seems to help substantially) the car really sticks to the road like glue. It's very hard to get my rearend to let loose anymore in curves or when shifting gears. I'm really prepared for FI now.
__________________
2007 Alloy GT Coupe - MGW shifter/C&L Racer CAI/JBA LT headers/SLP Powerflo/Steeda HD motor mounts/Coast 17# driveshaft/Richmond 3.89s/Steeda Ultralite 18x9.5/275 40 Nitto NT05/Autometer DPSS Lvl 2 shiftlight, gauges. Steeda Sport Springs/FRPP STB/GT500 front CAs with X5 balljoints/Steeda bumpsteer kit/Steeda Watts Link/Koni Sports/Steeda HD strut plates/BMR relocation brackets/Hotchkis swaybars/Steeda CA bushing kit/Steeda rear coilover adjusters.
Rubrignitz is offline   Reply With Quote
Old 05-18-2009, 07:17 PM
MustangForums
Ford Mustang




Paid Advertisement

 
 
 
Reply

Tags
17, 18, 19, 2010, benefits, buy, handling, inch, mustang, porsche, versus, vs, weight, wheel, wheels

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

Forum Jump

Advertising

Featured Sponsors
Vendor Directory
New Sponsors
All times are GMT -5. The time now is 05:19 AM.

© Internet Brands, Inc.


This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company
Emails Backup