95 wheels on a 73 Mach 1?
- Thread starter joarzero
- Start date
jikelly
20+ Year Stangneter 
I purchased a set of 17x8 94 mustang cobra rims for my 73 mustang and discovered yesterday that they will not fit on the front of my car without wheel spacers. The backspacing on most late model rims is 5.45 or greater. Because the 71-73 mustangs originally had wheels with 4.25 inches of backspacing, clearance problems occur when trying to install late model rims.
The 94 cobra rims came in contact with the upper control arm and the tires I installed also came to within an inch of touching the frame on my mustang. Of course that was with the steering wheel turned all the way to one side. With the steering wheel centered the rims still touched the upper control arms but there was plenty of room around the tires.
I decided to go with 245/45/17 tires and had them installed on the cobra rims. I used a tire size conversion calculator to estimate the tire size that came closest to the old tire diameter on my 14-inch rims so my speedo would still be somewhat accurate.
Anyway to correct my problem with the cobra rims I am going to install 1-inch spacers on all four corners. That will get the backspacing back where it needs to be. The 1-inch spacers are made of aluminum and actually bolt onto your spindles and axels. The spacers have a set of studs installed in them where your wheels mount. They run around 100 bucks a pair but I have seen some on ebay that were 150 for a set of four.
The 94 cobra rims came in contact with the upper control arm and the tires I installed also came to within an inch of touching the frame on my mustang. Of course that was with the steering wheel turned all the way to one side. With the steering wheel centered the rims still touched the upper control arms but there was plenty of room around the tires.
I decided to go with 245/45/17 tires and had them installed on the cobra rims. I used a tire size conversion calculator to estimate the tire size that came closest to the old tire diameter on my 14-inch rims so my speedo would still be somewhat accurate.
Anyway to correct my problem with the cobra rims I am going to install 1-inch spacers on all four corners. That will get the backspacing back where it needs to be. The 1-inch spacers are made of aluminum and actually bolt onto your spindles and axels. The spacers have a set of studs installed in them where your wheels mount. They run around 100 bucks a pair but I have seen some on ebay that were 150 for a set of four.
jikelly
20+ Year Stangneter
You might not have as many clearance issues as I had with the 17x8 rims. They should fit fine especialy with spacers. I wish I had the pictures I took of my rims installed uploaded. I'll try to get copies of them posted tomorow so you can see what my issues were.
Mach1steve
New Member
just don't Road Track it !
spacers are a bad idea if you are thinking of Raod Racing your car.
It puts extra stress on the wheel studs, which now carry all the torque instead of some being carried by the rotor hub.
For Racing, order the Rim with the correct backspacing for your car.
Here's a chart that may help you
http://www.dodgestang.com/Tire Fitment Guide 71-73.pdf
you must be able to view PDF files in order to open this.
Regards
Mach1steve
www.muggziperformance.com
spacers are a bad idea if you are thinking of Raod Racing your car.
It puts extra stress on the wheel studs, which now carry all the torque instead of some being carried by the rotor hub.
For Racing, order the Rim with the correct backspacing for your car.
Here's a chart that may help you
http://www.dodgestang.com/Tire Fitment Guide 71-73.pdf
you must be able to view PDF files in order to open this.
Regards
Mach1steve
www.muggziperformance.com
jikelly
20+ Year Stangneter
Well I have attached a couple of word files that contain the pictures in them. I don't have any picture editing software on my laptop and posting pictures on the forum is not easy so I put them in a compresed word document.
http://forums.stangnet.com/attachment.php?attachmentid=21838&stc=1
http://forums.stangnet.com/attachment.php?attachmentid=21839&stc=1
http://forums.stangnet.com/attachment.php?attachmentid=21838&stc=1
http://forums.stangnet.com/attachment.php?attachmentid=21839&stc=1
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