Tractor wheel spacings

If you can locate one, there are charts giving the ideal setting for every variation of number on bottoms, width of cut of each and tire size. This chart will apply whether plow is mounted, semi-mounted or trailing. You can also vary on that setting by probably 10%, and still do good plowing. However if the setting is perfect you will pull the plow much easier.

I had one of these charts years ago. I would expect they are still available from county ag reps or ag engineering depts. I wouldn't disturb anyone in sales these days, the guys that knew are either retired or dead. Allan's basically got it right.

Don't know your plow nor your tractor.

However, measure from the "centerline of pull" on the plow out to 16" beyond that first bottom's leading edge; this will put you at the furrow wall.

Then, add half the width of your rear furrow tire and an inch or two for tire squash. Double that figure and you should be in the ball park for total stance.

Hope I got that right with my cowboy chypherin'. :>)

Allan