Quote:
Originally Posted by fixithud
I just purchased a 2003 27rl fifth wheel. It has stock size 225/75-15 tires. I have quite a bit of towing experience and have never been overly pleased with st tires. I drive my truck 40 plus thousand miles on a set of lt's and get 5000 miles out of st's on equipment trailers.
I want to up grade to 16' wheels so I can have a better choice of tires. Has anyone done this and if so, what brand/size tire did up end up choosing.
I appreciate the help!!
Hud
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The first rule of plus sizing your tires is to insure they equal or exceed the load capacity of the Original Equipment (OE) tires.
I'm pretty sure your OE tires were ST bias. Therefore, the maximum load range for the ST225/75D15 was and still is LRD. That has a maximum load capacity of 2540# at 65 psi. Using those figures as a springboard for the "upgrade", the most popular size 16" tire having a chance to fit your wheelwell/axle clearance requirements will most likely be the LT225/75R16E. There are a lot of them built by popular manufacturers making them easy to find. The highway rib pattern is what you should be looking for. There are at least two very popular steel cased tires in that size available.
BTW, using industry standards for setting the recommended tire pressure for those tires would be 75 psi.
Good Luck,
CW