More tire info
I checked my records and found the following:Trailer tires: 225 75 D15, each rated to 2510 lb at 65 psi max.Spare: ST 205 75 D15, rated to 1820 lb at 50 psi max.Both tire sizes are D rated (highest temp and speed rating) but I believe the wider tread and higher pressure of the main trailer tires give them a higher load capacity.All-up weight of the boat and trailer (with outboard and on-board equipment is probably somewhere around 3,000 to 3,500 lb. However, I like the extra security of the higher load capacity tires, as those ratings are at max tire pressure. If a tire develops a slow leak while you're on the road, the load rating will suffer without you even knowing it.I'm also curious as I was advised never to use radial tires on a trailer because their sidewalls aren't stiff so the trailer is more likely to sway. However, I see radial tires on LOTS of trailers being towed on the highway at speeds over 70 mph, so I would assume they work fine. Is it really OK to use radials?H23 "Raven"