With the bumper in place, the tire carrier is slipped into position and the screw in hinge pin is torqued into position. I used a 2' break bar to put the lean on the hinge pin. Don't forget to screw the grease fitting into place on the hinge.
Lay a flat bar or piece of straight wood across the back side of your spare tire and then measure the depth from the under side of the bar to the mounting surface of your wheel. This measurement will be used to properly position the tire mounting plate in the tire carrier arm. With the mounting plate properly positioned in the carrier arm, set the depth of the carrier plate to be about 1/2" less than what you measure on the tire. This will allow just a little bit of compression of the tire sidewall when you snug down the lug nuts. Center punch the mounting holes on both side of the mounting plate insert.
Drill the two mounting holes in the sides of the mounting plate. Once the holes are drilled, screw the 3 tire stud bolts into the mounting plate. The plate will accommodate both 5 on 4.5" and 5 on 5.5" wheel patterns.
Slide the mounting plate into the tire carrier arm. Screw the self tapping bolts into the mounting arm. With my 3.5" backspaced rims, I was not able to compress tire against the tire carrier support arms. I could trim a bit off the end of the tire carrier arm but opted not do go that route (at least not yet anyway). Troy suggested I drill a 3rd mounting hole into the top of the mounting arm to help stabilize everything. So I drilled a hole as shown above and put in another self tapping bolt.
With the tire mounting studs in screwed into place, I tightened up the top
mounting bolt. I think it will work just fine. If not, I'll Sawsall
an inch off the arm so the tire mounting plate will fit closer and put the tire
up against the tire carrier support arms.
More Rear Bumper
4x4 Off-Road Homestead Firearms RC Flying