tubing size for a-arms?

[62fairlane]

ok I need to order tubing for my a-arms by the end of the week. I am getting some 4130 chrome moly tubing from wicksaircraft.com (local place) but I need to select a tubing size still. the arms are about 16" long with an air bag mounted on them. would some 1.25"x .090" tubing be too overkill? this is on a daily driver so pothole durability ranks higher then weight savings right now....but I won't want to TOTALLY overbuild the setup. I was even thinking of something as large as 1.375"x.090" tubing.