Tire Pressure

Wandering Sagebrush

Wandering Sagebrush

Free Range Human
I used the Google Search that Bill noted for Firefox, and it works neat, but I didn't find an answer to my question.

I just put new 10 ply tires on the trailer to get ready for the Lake Powell trip. The guys at the local Les Schwab dealership recommended 85 PSI (max for the tire), but the ride seems to be overly harsh at that TP. I suspect that 50 PSI in my truck airbags is contributing, too.

Any words of wisdom in the community? The trailer is a single axle EZ Loader.

Thanks in advance.
 
Steve,
I would base the pressure on the load rating on the tire. My 225/75 R15's Load Range E tires are rated to carry 2850lbs each at 80PSI. This info is molded on the sidewall of the tire. My fully loaded 22 with single axle trailer comes in about 5000lbs. I keep my tires at 80PSI which I figure gives me an extra 700 lbs of capacity. My be a little rough riding but since I am towing behind a dually, which rides pretty harsh anyway I hardly notice and I do like having the extra cushion. I have had Load range D tires before and they were rated for 2500lbs at 65PSI. It would seem to me that you could reduce the pressure to 65PSI and still be covered if you thought the ride would be improved. Or pick some intermediate pressure for a little "cushion."
 
This subject already exists so I thought I'd continue this thread instead of starting a new one.

What ballpark PSI do people use for tandem trailers carrying a 22 cruiser? I know there are ratings on the tires themselves but I'm not sure I'd want to go all the way up to the rating if it's meant to be a "limit".

50 PSI or so?
 
I would suggest you follow the load rating on the tire. You really cant go wrong. Tires have different ratings depending on the quality of the tire. I would think saying any poundage might be putting you in harms way if your tire wasn't designed for that pressure.

H :wink:
 
I run Carlisle radials on our tandem axle Float On Trailer, I run at 50 pounds cold like the side of the tire calls for. Our truck which is 2009 2500 series Chevy with a Dura Max and it calls for 60 pounds on the front axle and 70 pounds on the rear axle. It's best to run the pressures the manufacture recommends is my opinion. I want a softer ride think radial tires.
D.D.
 
I have a 23 Venture with a dual axel trailer. I run the maximum on that and also the single axel trailer on my little boat. I believe the ST tires are supposed to be inflated to their maximum.
 
Many tire manufacturers have a schedule of inflation pressures on the internet. I have posted some of these in the past. Look up your brand--if it is not available, then some of the more common brands are--and check the max pressure, with what is on the side wall of your tire, and see if the schedule on the internet will apply. You don't want the tires either over inflated or under inflated for the load. This affects both longevity of the tire and handling.
 
Bob/thataway is correct (as usual). Within the tires load range, the correct tire pressure varies with the load on each tire. The pressure molded on the sidewall is the max load and the corresponding pressure. At lower loads, the tire tread will not be flat at that pressure (overinflated) and the tire will wear in the middle. If you can get the mfg's recommended pressure for your load (trailer weight/4), the tire will wear evenly. If the pressure is too low the tire will overheat as well as wear on the edges. Thus, over-inflation is better than under-inflation. Remember the Ford Explorer with under-inflated Firestone tires?

I would call the mfg's customer service line and ask what is the correct pressure for your load.

As for the rough ride, all 10 ply tyres will give a rough ride. That's a heavy duty tyre. I would think that 10 ply rated tyres are overkill for a C-Dory 22 and would give a heck of a rough ride.

Boris
 
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