Maybe things have changed, I’m not sure. The parts catalogs are not very helpful. The TJ parts manuals don’t even mention the thinner bumpers at all. I had to get that part number out of the YJ catalog. YJ and TJ use the same tire carrier thickness so the bumpers always work with the same wheels between YJ and TJ, which means the parts catalog into is relevant.
The YJ used 4 bumpers, all on the tailgate. Early TJ had 5…the same 4 as the YJ on the tailgate, plus one additional down on the bottom on the tub panel below the tailgate. Then the later TJ, I think maybe 01-06? switched to 3 bumpers. I’m not sure if the later years with 3 bumpers had different thicknesses or not.
The parts catalogs list the following:
YJ:
1.22 - with compact spare
1.62 - with conventional spare
1.85 - with aluminum rim (this is false)
Compact spare is the 15x6 and those always got
The funky 225/75 poly spare temporary use tire. So they always used the thin bumpers.
1.62 was “conventional” because most YJs with 7” wheels (or 8” on the renegade) got a full size spare. So that would mean a 7” or 8” spare which needs the thicker bumper. Base models sometimes did get 7” main wheels paired with a compact spare. My YJ was like that, so it had the thin spare tire bumpers even though 7” stock wheels. Spare was the 6”. Kind of dumb because if you ever needed the spare, your normal wheel wouldn’t be very secure on the tailgate. Would probably want to stick it in the cab to carry it home if you had a flat.
No YJ ever got 1.85” bumpers, those are for TJ Rubicons with the 16x8s. It’s gotta be a misprint, because these catalogs were made electronically later on after the TJ was already out. I can not possibly think of any wheel and tire combo on a YJ that could use a bumper that thick.
Parts catalog info for TJ:
Early on (97-01) - parts catalogs totally skip the bumpers. It shows them on a diagram but it doesn’t assign them a part number at all. So technically 97-02 should have listed 55008263 (1.22”) and 55013350 (1.62”), but it didn’t for whatever reason. Must have missed it.
02 - only lists 55013350 (1.62”) - this makes sense because I believe the 15x6 wheel was discontinued by this point, and the Rubi was not out yet so only this size should have been needed for the year.
03 - only lists 55345519 (1.85”) this must be a typo, because while this part number was used for Rubis this year, there were plenty models still needing 1.62”.
04-06 - finally list both 55013350 and 55345519 (1.62 and 1.85”) - this makes sense for all trims. 1.62” for anything non-Rubi, and then the thicker 1.85” for Rubi.
I know I gave you way more info than you asked for there, but I feel it’s good to get the info out there. It took me forever to figure this out.
