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Old 06-09-2013, 08:57 AM   #1
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Join Date: Jul 2012
Posts: 2
ST145/R12 upgrade to ST175/80R-13

I have searched the great depths of this forum and cannot find anything about larger rims/tires on my popup. We have a 2002 Flagstaff 205 that currently has a set of ST145/R12 and we are looking to upgrade to an ST175/80R13. The tire diameter is 2.8" larger with would raise the trailer 1.4". Not a bid deal but is there enough room to accommodate the larger diamter in the wheel well? Trailer is about 2 hours away in storage or I would just buy a rim/tire and try ti out!!

Some feed back would be great.

Tire size: ST145R12
Section width: 5.7"
Outer diameter (when inflated): 21.3"

Tire size: ST175/80R13
Section width: 7"
Outer diameter (when inflated): 24.1"

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Old 06-09-2013, 09:03 AM   #2
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Posts: 896
The best thing to do is go and measure how much room your pop up actually has. By measuring from the top of the tire to bottom of fender. Pretty much gonna be the only way of knowing.
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