Sailun S637 on 3200lb Capacity Wheels

otrfun wrote:

JIMNLIN wrote:

Using this line of thought, is it safe to assume a rim with a 4,000 lb. load rating can safely handle 110 PSI of pressure? Or, put another way, do they make an 80 PSI tire with a 4,000 lb. load rating?

I'm not saying there isn't but I've never seen a 16" trailer wheel that was 4000 lb rated.
Now the 17.5" trailer wheels can handle that much load and 110 psi which is a good upgrade for folks with a heavy wheel loads and 7k axles.

Thanks for the info. Wasn't aware a 4,000 lb. rating was that much of a stretch for a 16" wheel/rim. I've seen 16" 4,000 lb. wheel/rims used OEM on some toy haulers.

To minimize all compatibility and safety issues on a very heavy rig, especially toy haulers, 17.5" is probably the way to go. I'm guessing the larger diameter 17.5" tires/wheels have the potential to create some clearance issues on units that originally came with 16's though.

The 215/75R17.5 Goodyear G114 is actually shorter (30.5") than an LT235/85R16G Goodyear G614 RST (30.7", IIRC). The G114 is rated 4805 lbs @ 125 PSIG - when hot, pressures run ~145 PSIG, so the 17.5" wheels have to be capable of handling these pressures.

I upgraded our previous 2004 Mobile Suites 36RE3 from the 16" G614 RSTs to 17.5" Michelin XTAs and never had any issues with clearance or tire performance whatsoever. The current 2014.5 Mobile Suites 38RSSA came with 17.5" Goodyear G114s which have been fine so far.

Rusty