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Old 09-02-2018, 04:26 PM   #1
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2022 20' Basecamp
1968 17' Caravel
Los Osos , California
Join Date: Nov 2013
Posts: 613
68 Caravel Wheel Tire Pressure Max - Hot Weather Inflation

I recently put a pair of new Goodyear Endurance ST205/75R15 load range D tires on a new-to-us 68 Caravel, single axle 17 foot vintage.

The Airstream dealer in Tucson inflated them to 60 psi cold at 106 degrees F ambient. The tires are rated at 65 psi max. Both pressures are within the load capacity ratings for the trailer. In fact I could have run 50 psi and still have been within the load capacity necessary for the trailer.

My concern is two fold.

One....what in fact is the psi limit of these 50 year old wheels? (nothing stamped on the wheels) Do I need to install newer wheels?

Two....I went with 60 psi because I wanted to make sure that there was enough air to cool the tires during the week long trip back to California in triple digit temperatures. I've heard that many tire failures are attributed to running lower tire pressures than optimal for hot weather travel. Is this conventional thinking or is more air/higher pressure actually necessary in hot climates?

The tires read 52 psi when I reached the California coast (68 degrees ambient).

So...I'm wondering, is carrying an air compressor and adjusting inflation according to ambient temperatures a good practice? How many of you guys do that?
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