69 Firebird - Wheel Setup

[Ron.in.SoCal]

It's really simple - blue tape the outide of your fenders @ 10:00, 12:00 and 2:00. Take the tape measurement on the inside of the finder lip parallel to the ground to the inside (rear) of your wheel house. Do both sides front and rear, just in case there's any variance. Usually the fronts are not the issue; it's the big meat in the rear, but just in case take note of your subframe and control arms to relay to Frank. This measuring point is where the tires will or will not fit. Typically 12:00 will have the most room. Make sense?

[ModernMuseum]

Thanks for the clarification.

Yeah, I can do that. However, I noticed in your points that you didn't mention how these three measurements are referenced to the location of the wheel mounting face. Don't some dimensions need to be taken there as well? i.e. wheel mounting face (on the axle) to the inner our outer fender?

[Ron.in.SoCal]

If I understand your question correctly, the measurements and resulting BS measurement will take care of this. Diff wheel manufacturers each have their own mounting pad design specs, but they don't vary too much. The only 'face' issue you really need to be concerned about is what wheel will clear what brake caliper you ultimately use. The template mentioned above will take care of that.

Final thought - Frank guarantees fitment!

[ModernMuseum]

Sweet, thanks a lot man.

I'll take the measurements and post them back up here for everyone's viewing, including Frank's.

[ModernMuseum]

Ok, tires have arrived:



I took all the dimensions as previously specified...I think.

Frank - let me know if you need some other dimensions:

(O'clock)
10 -------- 12 --------- 2

Rear:

Wheel Flange - Flange: 59"

Left Rear:
14-5/8 ---- 15 ---- 13-3/4

Right Rear:
13-7/8 ---- 15 ---- 14-3/4

Note: The rear inner measurement point was the leaf spring, since the tire would potentially impact the leaf before the inner fender. I already fit the wheels in there and they will fit with APPROXIMATELY 1/2" from the leaf and 1" from the fender lip.

Front:

Wheel Flange - Flange: 60-5/8"

Left Front:
13-1/2 ---- 14-1/4 ---- 13-1/8

Right Front:
13 ---- 14-3/4 ---- 14-1/2


There is a small discrepancy between the left front at 10 o'clock and the right front at 2 o'clock (these should theoretically be the same). I noticed that the inner fenderwell is fabbed a little different, i.e. has a different number of ripples where it is bent at the front.

[ProdigyCustoms]

You need to lay the tire flat on the ground and measure the section width without being mounted to a wheel. Mounted on a 12" wheel they will be 13.6 section. See if they are going to get more narrow or wider when mounted. You can also measure the outside bead to bead to see if they think they are sitting on 11s. 11.5, 12s, etc. Will give you a big indication how much more narrow or wider they will get.

I say a 12" wheel with a 7.5 BS.

[ModernMuseum]

Frank-

Section width: 12-11/16 for the rear.

Bead-to-bead: 11-5/16

I guess I'd like to get them on an 11" if possible. I'll give you a call shortly.

[ProdigyCustoms]

Are they 335?

[ModernMuseum]

315's. I left you a voicemail.

seven one three 494 nine five three seven.

[ProdigyCustoms]

OH, thought they were 335s

I was traveling yesterday, playing catch up today. I am back today. Will call

[ProdigyCustoms]

Frank-

Section width: 12-11/16 for the rear.

Bead-to-bead: 11-5/16

I guess I'd like to get them on an 11" if possible. I'll give you a call shortly.

And yes, those will pull down to 12.5 wide on a 11" rim.

[ModernMuseum]

Ok, give me a shout when you have a chance.

I'm ready to pull the plug once we get the BS issue verified.

Matte Centers, Glossy Rim (provided the dual powder coat option isn't an arm and a leg extra)
8"/11" Front/Rear Wheel

[ModernMuseum]

Frank-

The lug spacing is 4-1/2".

Also, I took some more measurements for your information. I measured from the wheel mounting face to the inner leaf spring (with the disc rotors installed) on the rear wheels and got the following:

Driver's Side Wheel:
In Front of the Tire: 6-3/4"
Behind the Tire: 7"

Passenger Side Wheel:
In Front of the Tire: 6-5/8"
Behind the Tire: 6-3/4"

Your recommendation for a 6.7" back-spacing seems off. This back-spacing would have the wheel touching the leaf spring, no? Please confirm.

[ProdigyCustoms]

Are you sure on the 4.5? GM pattern is 4.75. I could understand if the rear were 4.5 since it is Mopar, but it is very unusal the front is 4.5?

As for measurements, I think another phone call is in order tomorrow.

What your saytying would need a 6" to 6.2 BS (on pass side) which would make a front sapce of 6 to 5.8. Better measure somemore

[ModernMuseum]

I'll take another measurement for the lugs on the front.

I didn't take any measurements on the front tires today, only the rear. The BS that you specified for the fronts should be okay if you specify that for everyone (for camaros) I'm guessing.

I'm just saying in my above post that the minimal distance in the rear from the wheel mounting face to the leaves is 6-5/8", so this distance will be the nearest impact point of the tire on the inside.

[ModernMuseum]

Ok, I re-confirmed. Lug spacing is 4-1/2" center-center on all wheels.

Here's some pics of the front rotors. They're 11" in diameter. I assumed they were stock discs, but they may not be. I'll call tomorrow.

[meinthe73]

I could not find a Pro Touuring wheel in 2 tone black but I got a pick of a Pro Lite in Gloss Black lip and matte black center.

What wheels are these? thanks