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I believe that original FIA wheels were 6.5" and 8.5" wide.
It looks like the outer "Dish" of the wheel is the same on the 7.5" and 9.5" with the extra inch added to the rear rim and then the centre boss extended by about an inch. I have both 427 and FIA wheels here with 295 Avons on them. It looks like the rears have around an extra inch of caliper clearance compared to the 427 wheels. I could take some measurements tomorrow (It's almost 11:00pm here right now) if it's would be of any help. P.S. I have an "Original spec" Coupe chassis and body coming to me in the next couple of weeks, so if you are building an orig. spec. Coupe I might have even more dimensions then. :-) |
David I think you are right On the rim widths. I do not know for sure but I think If you used 6 1/2 inch wheel on the front. you do not have to bend the steering arms for clearance. I would be interested in knowing what your backspacing and hub thickness is on your wheels. It would also be interested in knowing what backspacing and hub thickness was on some of the original 6 1/2 and 8 1/2 wheels was.
I would like to hear about your coupe. and where it came from. Poland? You can see my build under the scratch builders forum here at CC. It is burial in that forum somewhere. I went back and found my thread. So here for your viewing pleasure is the link http://www.clubcobra.com/forums/scra...ml#post1027683 Thanks for posting Mark |
Cobra wheel hubs
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the front hubs are 4.5". I remember having to buy two new L and R front hubs from Shelby American and chase the hub threads to provide enough thread to mount FIA rear wheels on the front of my car in the 1970's. Conclusion, they are thinner in the rear on a stock 427, hope this helps. |
Thank You Bruce!
I was hoping you would speak up. My front and rear hubs are real close to the dimensions you posted. So you are saying the wheel hub itself on the rear wheels is thinner? If so that is good new for me! I have seen where you posted you have several original wheels. If they are in an easy to access area for you. Is there any chance you could take a few measurements with a tape of the width , backspacing, hub thickness. If you cant I understand. I appreciate your participation here on Club Cobra. Mark |
Bruce and everyone else does anyone know the difference between the standard pin drive hubs and the competition hubs? I figured Bruce would know.
Mark |
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My Mag FIA's ( race wheels) rears.
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Jeff nice picture! Looks like plenty of thread showing. 8 1/2 inch wheel?
Mark |
Yes, 8.5" as they were a touch narrower in the day.
Called Lynn, he said yes on the Trigo question. |
Thanks Jeff! Sounds like I have been concerned with something that really isn't a problem.
Mark |
Wheels
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I have never seen any 9" wheels in person, most ran 8 1/2" pin drives for legality on the rear. The new engine is a wiring nightmare, have to wire FAST XFI in place of a Classic FAST quite different should be running by Friday in case anyone cares. |
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Will you be at Good Guys in Pleasanton in June ? Ted |
Bruce if it is not too much trouble. Overall width. backspacing, and thickness of the hub of the wheel.
Good luck with your new engine. If you type I read what you type. If I lived close I would be willing to help in any way I could in your car adventures. Thanks again Mark |
Pleasanton
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Wheels
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Old people need their sleep! |
the Trigo FIA wheels have 1/2" more space for calipers than 427 wheels.
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Db Replicas It might have a 1/2 inch more caliper clearance but how thick is the hub of the 9 1/2 inch Fia trigo wheel. If it is thicker than 3 1/2 it will have less that 4 turns of the spinner on my rear hubs to hold it on.
I ask Curtis at Trigo what the hub thickness was on the rear wheel and was told 3.725. At that thickness I would only have about 2 turns of the spinner to hold the wheel on. Not good! I just need to get a simple real world measurement of a 9 1/2 wide Trigo FIA wheels hub thickness that will fit on an original car. Logic says that it has to have a thinner wheel hub thickness and still maintain the right backspacing to fit on an original car. The rear hubs on the cars are shorter than the front hubs on these cars. Mark |
Hi Mark.
Flat face to flat face:- Trigo FIA = 3 5/16" Trigo 427 = 2 7/8" ;) |
This thread really has me wondering what wheels are on my car. My ERA has 6 PIN FIA wheels and there is plenty of engagement front and back. They were originally installed on a turn-key FIA car, but now they are on my 427. Next time I have them off, I'll do some measuring.
https://scontent-ort2-1.xx.fbcdn.net...34&oe=59B5D843 |
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Thank you. Your FIA wheel would give one more turn than the front wheel I have would . The 427 wheel would give me plenty of thread engagement. I asked Curtis to re measure one of his wheels. We will see that he has to say. Mark |
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mark |
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