Off-Road Fabricators. Their mount holds two 5 gal. jerry cans, Hi-Lift, and its mounting bolts are bolted through
the body to hidden brackets supported entirely by the rear rollbar mounts. Stronger than any bumper or tub-mounted tire carrier. Note the mounting bolts do pass through the tub so it looks like it is bolted to the tub but it's not, all the weight is supported via the rollbar bases.
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I ran one for 8+ years (up until my TJ was stolen in March) and it was rattle free the entire time, plus it was still sag-free after all those years of carrying a full size 35x12.50 spare and two usually full jerry cans.