Awhile back when I mocked up the van axle using these 16” wheels, I had a 74 7/8” overall width from the outside of the tire to outside the other tire. I knew that would be too wide with these wheels. I had measured the width between the quarter panel flanges left to right..
I came up with this…
74 inches even.
I’ve been pondering how to get a wider axle in here that will allow the use of these wheels with such a deep backspacing. They are 16x10 with 6 1/4”’back spacing. It takes a 3/4” spacer just to get the wheels on the car and even that leaves a gap to the leafs you can measure with a feeler gauge. It seems weird to change an axle to use these wheels but with some judicious planning, I think I can do it cheaper than by buying new wheels.
Ta-Da ! I found a 71 Polara in a junkyard. They use a 30 3/4” axle shaft which will make the overall axle track width 3 1/4” wider. Axle housing, $106.
I had a pair of 30 3/4” shafts here with good tapered bearings. FREE. I’ll retain the brakes and 3.91 diff, FREE.
This means I can use this axle to accommodate these wheels and only spend a little over $100.
The Polara axle and tire width…
Oh oh….
Can you imagine trying to aim for a number and somehow hitting it right in the middle?
Not so fast…
I have to add 1/4” per side since this mock up has no backing plates or drums…
That means that each side is 1/4” over the limit. I could roll up the edges of the flanges….
That would open up some room but things are not as dire as they seem.
These tires are 295-50-16. I’m now looking to use a 255-50-16. That is 40 millimeters narrower, 20 each side of center. 20 millimeters is what…a strong 3/4” ? That difference would clear the body as it is by 1/2” each side.