Can someone tell me if the recommended tire pressure for a boat trailer is with the boat on it? I assume that it is. I shouldn't set the pressure without the boat on it, right?? How can I inflate the tires to the correct pressure BEFORE I load my boat back on it??
Like Derek said, the only way to know for sure is read the tiny print in the sidewall of the tire.
The most common tire pressure for a passenger car tire is 32 PSI. But your trailer could be using tires that have a higher load rating and thus require higher air pressure. For example, the tires on my camping trailer require 45 PSI.
HA HA you guy's crack me up! I worked for Discount Tire. 32 psi is not a common tire pressure. Each vehicle has a sticker on the inside of the door or glove box with the specific tire pressure. DKJ said it best 5-8 below max. Most boat trailers have a load range C tire which is 50 psi max. Check air pressure when tires are cold. You do not need to take the boat of the trailer. To much air and tires wear in the center not enough air and they wear on both edges. Rotate and balance tires every 5'000-6'000 miles.
Most new trailer tires are radials now. No you don't have to rotate and balance but it helps ensure the tires ride smooth and don't get a choppy wear. Tire manufactures recomend replacing tires if they are over five years old so check you're dot# ( 2505) that is the 25th week of 2005. You look at the last 4 # of the dot.
Interesting, Jory. That's not what Goodyear (or any other tire manufacturer) says to do. The psi range listed on the sidewall is the MAX you should inflate your tires to and not necessarily what your vehicle is designed to use. You'll find the same info on the other major tire manufacturer sites.
So many things that vary. 44 max psi on a tire is normaly xl load range. these are the most common load range in order standard,xl,c,d,e. In you're reference above you would still use factory specs. It would be a firmer ride.
I run about 45 psi in my 50 psi-max bias ply tires. The pressure does not change from loaded to unloaded which I just proved yesterday when I dropped my boat down off the winter storage blocks. In general I run all my vehicles tire pressures at just under max. Better wear, better mileage, sometimes rougher ride.