Tire placard

swimmer_spe wrote:

Cummins12V98 wrote:

swimmer_spe wrote:
I feel silly asking this, but i don't know where the sticker is that says what my 1999 Rockwood Ultralight 24' tire pressure is. Where would the sticker be located?

I will wager that your RV states to fill to the tires MAX sidewall listed. Why, because that's how they determine carrying capacity.

Now if you want to use the brain that God gave you go to the scales fully loaded. Now take that axle weight and divide by two. Compare that to the weight/inflation chart for your tire. Let's say the chart says 70Psi simply add 5 psi to that number. By doing this it will give the best ride, best stopping and best tread wear.

But then you can do like many others and simply air to the MAX on the sidewall or whatever the RV states.

This brain of mine that was not built by any god cannot even find the chart for weight loading. Otherwise, I'd do that.

HERE is a tire load and inflation chart for most popular ST trailer tire sizes.

The caveat with using these charts instead of the max sidewall inflation is you can really mess up and cause blowouts by underinflating the tire for the loads. You cannot just simply assume what weight load is actually on the tires and the weight is not evenly distributed across all tires. You must weigh the trailer when fully loaded, then use the load/inflation chart to set the pressures.

Understand that using any pressure below the sidewall max pressure rating results in reduction of the tires weight rating. The tire cannot handle the max weight rating if you choose a lower pressure than the max sidewall pressure.

One of the main reasons for tire blowouts is from exceeding weight rating whether that comes from simply too much weight or running underinflated for the load.

Some choose to play with inflation charts and some don't, I don't bother and inflate to the max sidewall pressure, gives me much more tire capacity which increases safety margin on the tires.

So far 15 yrs towing TTs I have not blown a tire including quite a few blackballed tire brands by forum members and even lots of China import brands that folks here complain about just by using the sidewall pressure.

Folks that choose to run lower pressures often do that to smooth the ride of the trailer, no one should be riding in the trailer so who cares if the trailer has a smooth ride.