Wrap a piece of string around the axle exactly one loop and measure the length. Then reach back to high school math and calculate the diamater by dividing by PI.

Divide the cicumference by 3.1415. Your loop of string should be almost 9 1/2 inches if the diameter of your axle is 3 inches.


1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble...