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Rear tire size
#1
Ok gonna try this one more time. Does anyone out there know what is the widest rear tire that will fit under a 1971 with rear disc brakes and no mods to the wheel wells? Wanting to run a 9.5-10 inch wide wheel.


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.jpg   CoupeR%20GT%20Wheels.jpg (Size: 50.87 KB / Downloads: 160)
.jpg   couper%20wheel%20black.jpg (Size: 26.85 KB / Downloads: 160)
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#2
I am using a 10" wheel with standard back spacing BUT I have flared fenders on my '73 Mach I.

I understand it (larger wheels and tires) can be done with custom back spacing. I don't know what wheel you intend to use but Vintage Wheelworks supposedly offer a 17 X 9.5 "Vintage 45" wheel with a 5 1/2 inch backspace and a 275/40R17 that is allegedly a nice fit.

Since each car is different, I would suggest you contact the wheel manufacturer that you intend to use for their input.

Hope this helps.

BT
Do the RIGHT thing.
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#3
I have 17x9.50 torque thrust II, with yokohama 255/40ZR17. The tires are a little more "lo-profile" than I really perfer but I bought them back in high school when I was a dips**t, well maybe I still am. Ha
Without changing anything I also run a 28X12.50 M/T slick with zero rubbing issues. I do use the same wheel spacer on both sets of wheels i think its 1/4 or 3/8 thick.
I do have "Grab a track" rear leaf springs that have a 1.5'' drop over factory.
So if you have stock rear springs you should have a little more room than me. I have about 2'' from tread to fender I cant remember the backspacing off the top of my head, id probobly have to measure...There are a few more pics i my gallery.


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Cody--
72 Mach-1 12:1 532 Forged internal Scat stroker, Kaase P51 heads, Comp roller cam, March serpentine conversion, C6 manual VB, 9'' 4:33:1.
66 convertible 289, 82k miles.
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#4
Thanks for the info. I think I'm going to buy one of those wheel selector tools that you bolt on and spin for clearance. Looks kinda cheesey but if it works and saves me from ordering wheels that dont fit I'm good with it.
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#5
Well ordered that cheesey tool today. Who knows it might be the best thing since sliced bread. We will see in a few days.
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#6
(10-20-2010, 09:17 PM)Tnfastbk Wrote: Well ordered that cheesey tool today. Who knows it might be the best thing since sliced bread. We will see in a few days.

Please let us know what you think of it. Sometime during the next decade I hope to by tires and wheels, and I'll be interested in figuring out rear wheel capacity.

Doc
Doc

[Image: 6y14ea.jpg]

Project started 8-7-10
Completed: All new suspension, rebuilt 351C H Code bored .030 over with mild cam and intake, new 3.50 TracLok, custom exhaust system
Current "mini-project": interior upgrade Undecided
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#7
Here is what it is supposed to look like


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.jpg   wheel selector.jpg (Size: 23.34 KB / Downloads: 120)
.jpg   wheel selector 2.jpg (Size: 104.33 KB / Downloads: 119)
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