I don't have a specific suggestion but a couple of things that may help your search are:
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1) the 185R-14 size used on our ToyHomes is the same size used on old VW buses/campers. You could
check out VW Bus-related content for suggestions.
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2) In a pinch, I once had a 195/75R-14 tire installed on the right rear dually on my Dolphin at it
fit without issues. It wasn't the right load range and all the tires on it were very old so I replaced
it soon thereafter, but 195/75R-14 might be a more available size. Make sure they're the right
load range our (heavy) vehicles.
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Good luck,
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Buzz L.
San Jose,CA
Former '86 Dolphin, '89 HiLux and '96 Tacoma owner
