80's 10bolt rear axle tube circumference (outside surface)?

[juanblzer]

axle tube Circumference for 80s 1/2 ton ten bolt rear axle?
I'm building a track bar and I'm likely going to use a big pipe clamp to weld an ear to.

 

[89GMCSuburban]

3" I believe

 

[79Beast]

"The circumference of a circle is equal to PI times the diameter". If your axle tubes are 3" diameter, round PI to 3.14 and multiply. You get 9.42"