Will 175/80R13 fit up on a Fiber Stream - Fiberglass RV

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Old 07-30-2013, 03:06 PM   #1
Name: JD
Trailer: Fiber Stream
Posts: 32
Will 175/80R13 fit up on a Fiber Stream

Has anyone switched to 175/80R13 tires from the original tires on a Fiber Stream?

The tire overall size is 24" vs the original 22" but I more concerned about the back-set and fit of the rim on the hub. I'd use these on a suitably sized center hole 2.85 and 4 on 4 lugs.

Availability of ST175/80R13 Tire Size With 4-Lug Wheel To Replace A78-13 Tire Size on Trailer | etrailer.com


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Old 07-30-2013, 07:19 PM   #2
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Name: Brian
Trailer: Boler (B1700RGH) 1979
Posts: 4,999
One of the Fiber Stream owners might be able to comment on the room available on both the back and front sides.

Although I don't know the specific reasons in this case, I understand that there would be multiple reasons to get away from the original tire size/type, which I understand to be 4.80-12. The thread Fiber Stream Wheel, Bearing Sizes discusses both a swap to 13", and the more common slight upsize to 5.30-12.

Personally, my impression is that any available 13" ST tire would be a questionable fit, and I wouldn't want to raise a trailer of mine just to fit bigger tires. In that earlier thread Frederick mentioned that Chris had swapped to 13" tires, but the exact size is unknown.

I have long thought that the logical upgrade from those old 4.80-12 and 5.30-12 tires is the 145R12 (presumably specifically ST145R12, LT145R12, or 145R12 commercial). These are tires of much more modern construction (say, 1970's technology instead of 1930's), not much larger in any dimension than the old stuff, requiring substantially less air pressure for the same load capacity. A 145R12 would fit on the same 12"x4" wheel as a 4.80-12 or 5.30-12.
1979 Boler B1700RGH, pulled by 2004 Toyota Sienna LE 2WD
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