Just finished a project to carry the bikes! I cut off the stock bumper ( flimsy and thin) and welded some 1/8" 2 × 3 rectangular tube thru the rear stringer to the main frame, then used 1/8" 2x4 rec tube for the bumper itself. Then i welded a prefab receiver on the bumper. Its not too heavy, about 45 lbs. Then, I moved the spare to underneath front by mounting to it with a spare tire wind up mechanism from a Chevy S-10 right on the main frame. Really worked out well. Plenty of room and I think it offsets the added weight in the rear. I do want to let you know that I did beef up the suspension by switching out the 2200# axle for a 3500# and got 1500# springs to go with it so it wouldn't bounce a lot. The hitch should hold a good amount as long as the PU is packed correctly. I'll post some pics next week when i get time. Any questions? Next project is a Porto pottie for night time nature calls.