What are the stock wheel backspacing...offset, and all the other specs of a 77 F-100 Custom 4x2 rim?

 

are you asking about the 16.5" rims? if so, I have a set out back and I can go measure.

 

an F100 should have 5 bolt 15" wheels.

B/S I think is 4" or 4.5"

 

The backspacing isn't much, I want to say around 2.5"-2.75" .
Offset is something different.= Where the center of the wheel is compared to the edges(not a good explanation, but if I could show you, you'd understand).

 

i understand what your talking about entirely its like the radius right?

 

i know they are 15s lol i just need all the other measurements

 

The information below was obtained from (the site has some good diagrams to help illustrate these measurements):

http://www.rsracing.com/tech-wheel.html#backspace

How to Measure Wheel BackSpace
Items required to measure wheel backspace: Tape measure
Straight edge
Wheel w/o tire (preferred)

The easiest way to measure backspace is to lay the wheel face down onto the ground so the backside of the wheel is facing up. Take a straight edge and lay it diagonally across the inboard flange of the wheel. Take a tape measure and measure the distance from where the straight edge contacts the inboard flange to the hub mounting pad of the wheel. This measurement is backspace.

Measuring Wheel Offset
To calculate offset you'll need the following measurements:

Wheel backspace
Wheel Width
Wheel Center line (outboard flange to inboard flange measurement / 2)

Subtract:

Wheel center line from Wheel backspace to get offset. If backspace is less than the wheel centerline the offset is negative
If backspace is greater than the wheel centerline the offset is positive


Tip:

To convert from inches to mm multiply by 25.4
To convert from mm to inches divide by 25.4

 

Backspacing on stock 5 x 5.5" Ford factory rims:

15x6" steel and forged aluminum (10 hole and 5 slot) rims is about 3.5"
8-spoke (with center plus trim rings) 15x7" steel rims is 3.75"
8-spoke 15x8" steel rims (same as above but only came as option on Broncos) is 4"
10-hole (with rivets) 15x7" forged aluminum rims is 3.5"
10-hole (no rivets) 15x7.5" forged aluminum rims is 3.75"

I have owned those rims and that is why I know. Currently I am running 10-hole (no rivets) 15x7.5" forged aluminum rims (from a 1996 F150) on my 1978 F100.
I also have two spare 5-slot forged aluminum rims (15x6") from a 1977 Frewheeling truck, and looking for the other two to complete the set. This will allow me to have a narrower tire width (on common 235/75-15 tires) on light aluminum rims than when mounted on 15x7.5" rims, which helps significantly MPG (about 2 more MPG). I used to run the stock steel 15x6 rims and I lost about 2 MPG going to the wider 15x7.5" rims (on the same 235/75-15 tires!).

Raul

 

but my rims are four spoke? more like steel rim welded to a big square piece of steel? painted grey with chrome hubcaps(just look in my gallery to see what im talking about)

 

broke77f100:

Your rims are the standard issue 15x6" steel (with a backspacing of about 3.5 inches). Like I mentioned before, Ford made rims (70's to 1996) as wide as 8 inches with a backspacing of 4 inches. I know you can stuff wider rims with larger backspacing in the rear, but you may start running into problems if you go wider than 8" and more than 4" backspacing on the front.

Now, if you lower your truck then you really need to figure out what will be the maximum width and backspacing (or offset) that you will be able to fit (particularly up front). Raul

 

http://customwheelsmarket.com/cwm-top-1136-22185c.html

those are the rims i want to use or some other 22s

 

again with the 22s...
It's your truck, but don't humiliate it like that.

 

hey u know what MBBFord you can just stfu...u cant call it humiliation if it looks that damn good...its not like its gonna be a flatbed or anything(im looking for a stock 8'er) u gotta stop hatin cuz my ride is better than yours

 

broke77f100:

The backspacing on those 22" rims you like is 6.5", which means the rims will be tucked way in, which means they are going to hit the rear springs and the front suspension components, or your are going to have to heavily modify your truck (like putting a car front clip- like a Mustang II kit- and rear 4-link suspension or relocate the rear springs inboard).
Probably the most backspacing you can have without hiting any thing in your front/rear suspension is 5" on a normal (non-lowered) truck. Good luck with your project (but all I can say is do your homework and take a lot of measurements).

 

ALREADY PLANNING FOR THE MUSTANG ii AND 4-LINK OH AND 'BAGS ALL AROUND WITH REAR C-NOTCH