Trailer tires pressure
- Thread starter alainP
- Start date
colbysmith
Active member
Mine are too. But we're not talking about automobile (P and LT) tires here. (Well actually, they are inflated to the owner's manual recommended PSI for towing, which happens to be 36 psi, as opposed to 31 (Highlander) or 35 (F150) shown on the door jam label,)
Interesting. Gave me a reason to pull out my 64th edition, and there it was on page 253. Unfortunately, none of those tire sizes appear to be what most of us are running with our C-Dory trailers.
Just a question for those of you that prefer load/psi charts with your trailer "ST" tires. What weights are you using?
Colby
colbysmith
Active member
I have done this as far as both trailer axles at once along with the truck, at various load status: you can see those weights I supplied Alain with earlier. Those are static weights, and for the most part are also pretty constant. What I don't know is each wheel's weight in dynamic running. So aren't you really just taking a best guess scenario? I think I can see why some feel keeping 65psi in the tires is ok when they upgrade to E's, if static weights are still within the load range of the trailer and the recommended max psi on LR-D tires (as shown on the trailer certification plate). But then are you defeating the purpose for upgrading to the LR-E tires? (To provide more support in case of a blowout, or better buffer for normal trailering.) Aside from your and a few other's complaints of increased bouncing or middle tread wear (which I have not experience on earlier trailers) what harm or disadvantage is there from running the max psi stamped on the tire's sidewall? Colby
colbysmith
Active member
Alain, I don't think my earlier reply with my weights was easy to read, since I put much more data in. Will be interesting to see if Bob's weights on his 25 are similar to mine. We both have the same trailer I believe. Mine has a spare tire and hub mounted on the front of the trailer just behind the bow stop.
Weight of both axles with full water and fuel in boat: 7660
Weight with out fuel and water: 6320
Tongue weighs w/o fluids: 615, w/ fluids 644
Looking at my current weights closer, I'm almost talking myself out of a need to go up to E's... So this thread has not only been entertaining to me, but gaining some more knowledge as well.
Colby
Colby, you said:
"C-Traveler weight, no fuel or water, no trailer: 5400 lbs".
How did you get that number? A crane with a load scale?
I was asking Bob what is numbers were to see if the load on his axles was similar or different. I realize that it might fluctuate due to how the boat was loaded. I know mine can go from a nearly 6 " stern overhang pass the bunk boards to almost flush with them.
When I use a crane for loading I have more control of course.
I always wondered how much effect that 6" or so had on axles load, tongue weight etc..never felt any amount of difference while towing though.
"C-Traveler weight, no fuel or water, no trailer: 5400 lbs".
How did you get that number? A crane with a load scale?
I was asking Bob what is numbers were to see if the load on his axles was similar or different. I realize that it might fluctuate due to how the boat was loaded. I know mine can go from a nearly 6 " stern overhang pass the bunk boards to almost flush with them.
When I use a crane for loading I have more control of course.
I always wondered how much effect that 6" or so had on axles load, tongue weight etc..never felt any amount of difference while towing though.
colbysmith
Active member
I weighed the new trailer bringing it back from the manufacturer before transferring C-Traveler to it. Then just subtracted that weight from the loaded trailer.
The empty trailer weights, with the spare tire and hub, was:
Tongue: 360 lbs
Axles: 1280 lbs
for a total weight of: 1640 lbs.
The axle weights are from a CAT scale, such as Flying J truck stops have. How accurate are they at such low weights compared to semis? Probably pretty close, as I've weighed at different truck stops and even highway truck scales when the opportunity has presented itself. For the tongue weights, I use a bathroom scale set up with a fulcrum board. I do find that the truck scales can be off 10-20% at those lite weights.
Colby