Mustang Monthly Homepage Mustang Monthly
Get Adobe Flash player

Select The Perfect Tire

P-Metrics, Plus-Sizing, And Where You Fit In
By Jeff Ford, Mark Houlahan
Photography by Jeff Ford
P98370 Image Large
As an experiment, we set up... 
   
  read full caption
P98370 Image Large
As an experiment, we set up our ’73 Project vehicle with the BFGoodrich radial equivalent of the F70-14 that originally came on the car. These tires are tall and offer a good, soft ride but will not hold in the corners as well as a low-profile tire.
P98371 Image Large
This is a good example of... 
   
  read full caption
P98371 Image Large
This is a good example of plus-sizing a tire. The BFG on top is a P235/60R15 and the BFG on the bottom is a P205/70R14. Note, the rolling diameters are identical.
P98372 Image Large
The Mach 1 is now dressed... 
   
  read full caption
P98372 Image Large
The Mach 1 is now dressed out in what is arguably the most popular Ford rim available: the Magnum 500. These particular Mags are from Specialty Wheels and are mounted with the P235/60R15 tire. This tire is a close replacement for the size that Ford originally used on this rim, the F60-15. Also note, plus-sizing has reduced the tire sidewall but kept the approximate 26-inch diameter. This tire also gives better handling due to its lower sidewall profile. Unfortunately, ride—when compared to the 70-series tire—will suffer.
P98373 Image Large
Up next is the really big... 
   
  read full caption
P98373 Image Large
Up next is the really big meat. On top is the P235/60R15, and on the bottom is the P255/50R16. Both carry an approximate 26-inch diameter. Only the ’71-’73 cars need apply for this particular width of tire; other year models might support the tire in the rear, but the tire could cause some serious conflicts up front.
P98374 Image Large
This is what happens with... 
   
  read full caption
P98374 Image Large
This is what happens with Specialty Wheels’ new 16-inch Magnum. Stealthy! Many folks will assume you have a set of 15-inch 500s on your car, but you’ll know the truth. The only giveaway is the lack of lettering on the BFGs. Most performance tires from BFG don’t carry raised-white-letters beyond the 15-inch width. As with the 235 series, the sidewall is again smaller and handling will improve once again, but ride will suffer.
P98375 Image Large
These 16x7-inch Halibrands... 
   
  read full caption
P98375 Image Large
These 16x7-inch Halibrands and P225/55R16 BFGs are set for installation on a sister publication’s Project ’66 Ranchero. We stole the wheels to see what an aftermarket set would do for the ’73. Hmmm. Wheels; we didn’t see any wheels for a Ranchero. These wheels with their near-factory offset would work very nicely on any Ford product—even on a ’65-’66 Mustang.
P98376 Image Large
The four tires tested are... 
   
  read full caption
P98376 Image Large
The four tires tested are shown left to right: P205/70R14, P225/55R16, P235/60R15, and P255/55R16.

It can make you dizzy—this thing called tire-and-wheel selection; especially when you get involved with plus-sizing and try to figure out what type of tire or wheel you need. Reams of paper have been written on this subject, and a good amount of bandwidth on the Internet has been devoted to it. What we’re going to do for you here is remove some of the mystery and make it easier for you to make the “right choice” on the tire front. Where wheels are concerned, we will not profess to know what the ultimate wheel package is for your vintage Mustang. But we will show you how plus-sizing affects the look and feel of a ’73 Mach 1. First, we’ll throw on the stock ’73 slotted wheel, followed by Specialty Wheels’ excellent reproduction Magnum 500 in both 15- and—the new—16-inch sizes. Finally, we’ll throw on a set of 16-inch Halibrand five-spokes to see what this beautiful custom wheel can do for your Mustang.

Also, select from the sidebars below for sizing information and helpful formulas.

BFGoodrich (call for the nearest dealer) Mustangs Plus
Stockton
CA  95205
(800) 999-4289

www.mustangsplus.com
Halibrand (call for the nearest dealer) Specialty Wheels
Sandy
OR  97055

Ford Mustang Research
Ford Mustang Review in-depth reviews on the new Ford Mustang, featuring test drives, comparisons, options, features and more. The Mustang gets 16 mpg in the city and 24 on the highway, and has a trade in value of $18,870.00 which should come in handy when you go to shop for your next car. Other similar vehicles are the Ford Shelby GT 500 and the Ford Fusion.
 
1966 Ford Mustang & 1965 Ford Mustang Hi-Po GT - Beyond The Basics
Exclusive Ford Mustang tech questions, featuring a 1966 Ford Mustang, 1965 Ford Mustang Hi-Po GT, and much More!... more
 
1965 Ford Mustang Convertible - Jeanie Williams' 1965 Mustang
Check out Jeanie Williams' 1965 Ford Mustang Convertible... more
 
1968 Ford Mustang Fastback & 1965 Mustang Coupe - Beyond The Basics
Vintage Mustang Tech Advice From Bob Aliberto... more
 
1965 Ford Mustang Convertible Gets 331 Ford Small Block
1965 Ford Mustang Convertible Gets 331 Ford Small Block... more
 
1965 Ford Mustang Fastback Ebony And Silver
1965 Ford Mustang Fastback Ebony And Silver... more
 
1965 Ford Mustang Convertible Top Repair - How To: Replace Your '65-'68 Convertible Top
We Follow Along As A '65 Mustang Gets Its Top Replaced... more
 
1965 Ford Mustang Coupe - Super Steed Handling
In A 30-Hour Period, RRS And Gateway Classic Mustang Transformed An Ill-Handling Nag Into A Sure-Footed Stallion.... more
 
1969 Ford Mustang Cougar XR-7 & 1965 Ford Mustang Fastback - Beyond The Basics
Exclusive Ford Mustang tech questions, featuring a 1969 Ford Mustang Cougar XR-7 & 1965 Ford Mustang Fastback, and More!... more
 
1965 Ford Mustang GT350R Shelby & 1969 Ford Mustang Boss 302 - Pony Tales
Exclusive Ford Mustang Stories, featuring a 1965 Ford Mustang GT350R Shelby, 1969 Ford Mustang Boss 302, and much More!... more
 
1965 Ford Mustang Fastback With Ford Racing GT-40 Engine - Modified Muscle
Check out this custom 1965 Ford Mustang Fastback "STE Classic" with a Ford GT-40 engine from K.A.R. Auto Group, with disc brakes, billet parts, American Racing rims, and custom firecracker red paint... more