I have a used Trailer axle for sale. It came off a car hauler. Has break set up on it. I bought it for a project build. Plans have changed. The axle is rated for #3500 and is a 5 hole axle. The axle is 78" center spring shackle to spring shackle. It is a square tub so it could be widened or shortened fairly easy if needed. Im asking $120 for the whole set up. Would be good, for someone building a custom trailer.