Help with rims

J

jhljr44@yahoo.com

Member
Okay, I need your expert help again. I now own a nice little 55 ford f-100
that came to me with a newer differential. A 9" ford with 5 on

4 1.25 lug pattern 15 " rims. What the heck is this? I need new rims as the rear rims i have don't center and feel square. The front fits nice but it's a mustang conversion but a kit with no date. Same pattern but centers.Thanks again for the help' Jim.
 
jhljr44@yahoo.com said:
Okay, I need your expert help again. I now own a nice little 55 ford f-100
that came to me with a newer differential. A 9" ford with 5 on 4 1.25 lug pattern 15 " rims. ...
Click to expand...
What measurement is the bolt circle diameter???
 

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You need one of these. Always have mine for swap meets, etc.
 

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I'm not clear as to exactly what you mean by "Mustang conversion" so I'm assuming it's the front. 4.25 x 15 Ford rims changed from a small center opening to a larger one. Often front disc brake conversions come with the hub of the rotor turned down to allow earlier wheels to fit. The 9" rears came the same way AFAIK. Sounds to me like you've got mismatch on the center opening. The two above post are correct for measurement and for spacing the wheel out to clear the larger center opening. I've never used spacers for that problem, but if 51540bat is saying it works, ok. I've always bought wheels that would center on the lugs, and made sure there was flat contact to the drum or rotor.

Oops, I just realized he's showing a measuring device, not a spacer. But my comment about the wheel centers stands. And I missed the 4.25 should be 4.5. To many years, I guess.
 
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While Ford did come out with a 4 1/4" bolt circle on some models a
few years ago, Your 9" rear and Mustang 5 lug front should be 4 1/2".
Measure using the chart that dmsfrr provided for measuring 5 lugs.

Also, you say the center hole on your 9" rear is different then the wheels
you are using. Is that center hole smaller then your wheel center hole ?
I believe it was in '69 that Ford changed the size of the center hole.
Ford changed from 2 3/8" center to 2 3/4" center hole.




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I upgraded the front brakes on my '54 Ranch Wagon to Grenada Discs. The rotors supplied in the up grade kit were machined down to accept the smaller center hole stock 15" wheels. I then installed an 8" rear end from a Maverick. The register on the new rear end was 2 3/4" so the stock Ranch Wagon Wheels wouldn't fit. I ended up with new 15 inch wheels all around with the larger center hole so down the road I could use a stock Grenada rotor without needing to have it machined down.
 
We machined out the center holes so the wheel fit flat against the hub. and viola. That did it. We opened them about 1/8". I still haven't figured what wheels I need. The pattern is 5x 108mm?
 
Is it out of a Demon? The dusters, and all the other Plymouths and Dodges were different for some reason. Kid I went to high-school with had a demon, and his drag slicks were on Centerlines he had to order from Jegs.
 
Most Mopars had the 5 lug x 4.5" bp.
But Mopar also used the 5 lug x 4.0" bp.

Only 1 Mopar that I know of used the 5 lug x 4.25" and that was '90-'92 Monoco.



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You can open up the center hole on a thicker aluminum wheel somewhat,
and be pretty safe.

When you open up the center on a steel wheel, it is very possible
that the metal will flex and crack from the center hole to the lug holes,
and that is very un-safe.




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449178

These are definitely handy little guides to correctly identify the different bolt patterns when you are looking for a wheel with a specific bolt pattern at a swap meet.
 
1982-1990 Bronco II used a 5x4.5" bolt circle wheel.
The small Ranger pickups used that same wheel for most years too.





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