VCCA Home Forums TECHNICAL - 1945 AND EARLIER 1912-1928 Tire pressure

There have been several posts on here about tire pressure and most of you say that 40-45 psi. seems to be the sweet spot for the 44/450-21 tires on our 20's cars. Last night I was perusing the Coker Tire web site and they list the maximum pressure at 32 psi. I then went out to see if mine had any markings (Goodyear) and there is nothing on the tire. i have mine at 40 psi and so far have not had an issue, but it is summer and getting hotter outside, and I do not wish to experience a failure while out on the road.

Shaung
repair manual says 34 pounds on pg 259.
bet it rolls good at 40
my modern car tells me tire pressure, as tire heats up pressure goes up
on a hot day 40 might go to 45 or 47
I got my 27 at 34
Ken 45145

If you don't want a rise in tire pressure, fill them with nitrogen instead of air. You won't see a rise in pressure. We use nitrogen in our race cars, we never even see a half pound increase with nitrogen.

Thanks Ken. I think I will air them down a bit before the next drive. As to Nitrogen, Don't have a generator in my garage. Definitely not worth paying to do it. Yes, nice to have, but not on my list of must haves.

Edit: I just looked in the manual and it says "at least 34 psi." i am going to try 36 and see.

You don't need a generator...... Almost every tire store in the area provide nitrogen. Ask your nearest tire store. Go there deflate them and let them fill them up.. I don't have a generator either. I get it in a bottle just like Oxy accetlyne torches use. It's cheap!!

I was kidding, My son is a licensed mechanic and has access, but it just isn't worth the trouble to me. It is not the pressure change due to heating that concerns me, it is the initial tire pressure. i have a large compressor so i can air them up and down in seconds.

OH I thought you were woried about a failure because of the summertime heat. A rise in pressure is what causes this. Ask any truck driver.

10 years working at Canadian Tire in my early years taught me a few things about tires. i have seen my fair share of tire failures for all kinds of reasons.

You are aware that I'm NOT speaking of Liquid nitrogen. BUT the gas Nitrogen. It is safe an readily available. You speak like I have stepped on your toes or something. I will leave this topic alone since you sound like you didn't want my input!

Xcode, I am very well aware of what you are speaking about, and I respect your opinion on the topic. But as i said, Nitrogen does not interest me for this application. You are not stepping on any toes. All opinions are welcome.

If you use air out of a compressor you are getting about 80% Nitrogen, Out on the farm we used Propane, but half Propane and half air is going to go BOOM! if you get it too hot or you strike a spark. Have you ever seen a tire man use starting fluid and a cigarette lighter to seat a tire on a rim? It is scary, and I know a tire man with a cast on his arm today. He is lucky to have an arm....and a head.

i have never seen it done, but have heard many stories. When I was very young, an uncle had a tire shop. My son has done it once or twice to seat a tire. Scary indeed!