Useing jack

Had a flat just outside Atlanta coming north. I had made up some short 2x8 wedges which I can make a short ramp. One edge is beveled. Poor mans trailer aid..Backed the good tire up 4 inches high. My trailer has no plate on the bottom just the u bolts. I carry a small 2x6 and use that under the U bolts. Used the truck bottle jack to raise the tire.
When I replaced the tire(s) 2 in Chattanooga the tire guys just slide the lift jack under the U bolts and raised away. I'm going to get an impact drill for the next time.