Technical Magnum dropped axle width?

In the ad below is the 47 3/4 in. WIDTH dimension listed mean the same as the king pin center line to king pin center line distance? The reason I ask is because I would like to know how much narrower this axle is than the stock 1940 Ford axle. Don't want to turn this into the quality of cast and forged axles. Thanks.
https://www.magnumsuspension.com/products/4-dropped-i-beam-axle-47-3-4-width

 

Stock 40 ford;
1937-41 FORD DROPPED AXLE
ORIGINAL AXLE MEASUREMENTS

48-1/2" Kingpin Center to Center (top)
38-1/2" Spring perch Center to Center
2-1/4 Spring Perch Boss
2-1/8" Factory drop
.8125 Kingpin dia.

Why not ask them?
Magnum Suspension
5525 N Golden State Blvd #105
Fresno, CA 93722
559-276-0700 Phone • 559-276-0709 Fax

 

https://droppedaxles.com/ford-dropped-axles-0#1937-41 Ford Dropped Axle

 

Thank you for the info. Thanks to your help I was able to
calculate that the Magnum 4 in. dropped axle is a total of
3/4 of an in narrower than the stock 40 axle. This pulls the wheels in
a little closer allowing for more fender clearance.
(48 1/2 - 47 3/4 = 3/4)

 

It’ll pull them in running stock brakes. If you run discs it usually pushes them out some.


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Any idea how much "some" is?

 

some is 1 inch if you use pete/jake disc brake

 

It could be even 2 to 2 1/2 narrow then what they state after it snaps in two. I couldn't help it. Somebody slap me

 

It depends on the disc brake kit, the magnum kit with mopar rotors I believe moves them out 5/8”.


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I've run one in my avatar for probably 100k with no issues. I've used this axle in several builds and they work as designed.

 

When they drop your original Ford Axle, they can give you a width from 46 1/2" to 48 1/2" which ever you choose. Call Sid at at his Web site.
https://droppedaxles.com/ford-dropped-axles-0#1937-41 Ford Dropped Axle