Step 1: Gather Supplies
2 - Yakima lockable fork mounts for the bikes
4 - 1/4-inch mounting bolts for fork mounts, 3/4-inch longer than thickness of fork mounts
2 - Delta wheel mounts.
2 - 4-inch hinges with removable pins
1 - metal rod slightly smaller than hinge pins
4 - 1/4-inch bolts 1/2 inch longer than thickness of wheel mounts
4 - 1/4-inch bolts 3/4 inch longer than thickness of wheel mounts
12 - 1/4-inch lock washers to fit bolts above.
12 - 1/4-inch nuts to fit bolts above.
3 1-in eye bolts
6 flat washers to fit eye bolts
3 lock washers to fit eye bolts
3 nuts to fit eye bolts
Step 2: Modify Hinges
wheel sizes and not get in the way when not in use. To accomplish this, I bought two 4-inch hinges from the local home improvement store. I also bought a metal rod slightly smaller than the hinge pin, and 4 bolts a half inch longer than the thickness of the fork mounts. Back at home, I removed the hinge pins with a punch. Next, I cut two pieces of metal rod about 2 inches longer than the width of the hinge and ground the ends smooth on the grinder. One end of each rod I bent to an L shape. On the other end of the rod I drilled a small hole just large enough for the cotter pin. I then test-fit the rods and cotter pins on the hinges. The rods should fit the hinges slightly loosely, and the cotter pins should insert and remove easily from the holes in the new hinge pins.
Step 3: Mount Hinge Halves & Drill Holes
Step 4: Mount Rack in Truck Bed
Other mounting options are to have the rack insert into the stake pockets, or to build a frame that fits snugly into the space between the front of the bed and the wheel wells. You could also mount the rack backwards near the top edge of the tailgate.
Step 5: Test Fit
Next attach the wheel mounts to the hinges using the L-shaped hinge pins and cotter pins. Test mount the wheels and bikes. Turn the pedals all the way around to make sure that they don't hit anything else. If you've measured properly, this shouldn't happen, but if it does, go ahead and fix it now. You can leave the wheel mounts in place, but they can be easily removed using the cotter pins if they interfere with other cargo.