|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
04-08-2023, 06:42 AM | #1 |
Junior Member
Join Date: Mar 2014
Posts: 12
|
Radial tire pressure
What is the recommended pressure to run in the 19 inch American Classic radials?
|
04-08-2023, 07:04 AM | #2 |
Senior Member
Join Date: Jan 2012
Location: Western North Carolina
Posts: 4,143
|
Re: Radial tire pressure
The tires have 35 psi printed on them. I found this to be too low. I run 50 in the rear and 45 in front with my heavy Fordor. Go for a drive of about 10 miles then touch the sidewalls. It they are hot to the touch then the pressure is too low. The sidewalls should be warm, but not hot. Disclaimer: Since the tires have 35 psi printed on them, you are on your own when increasing the pressure. Modern tires that are not damaged, for instance by running on them when they are flat, can withstand 200 psi. But I am telling you what I do and not recommending that you do the same.
__________________
A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past. |
Sponsored Links (Register now to hide all advertisements) |
|
04-08-2023, 08:06 AM | #3 |
Senior Member
Join Date: Jan 2016
Posts: 2,140
|
Re: Radial tire pressure
Coker told me to run 35 psi on my 19" ww radials.
|
04-08-2023, 09:54 AM | #4 |
Senior Member
Join Date: Jul 2011
Location: Redondo Beach, CA
Posts: 5,945
|
Re: Radial tire pressure
I tried 40psi in my 4.50-500x19 American Classic radials and found the ride a little on the harsh side. Drop down to 35psi and the ride is much more to my liking.
I suggest you try different pressures on your car and find what you like. |
04-08-2023, 10:07 AM | #5 |
Senior Member
Join Date: Apr 2018
Location: Mebane NC
Posts: 2,414
|
Re: Radial tire pressure
I’m guessing the different answers have a lot to do with the different weights of these cars. Neil’s car is pretty heavy as I recall.
|
04-08-2023, 10:19 AM | #6 |
Senior Member
Join Date: Jul 2011
Location: Redondo Beach, CA
Posts: 5,945
|
Re: Radial tire pressure
Sponsored Links (Register now to hide all advertisements)
Last edited by Y-Blockhead; 04-08-2023 at 10:29 AM. |
04-08-2023, 12:07 PM | #7 |
Senior Member
Join Date: Jun 2014
Location: Land of Lincoln
Posts: 3,177
|
Re: Radial tire pressure
IMHO by over inflating your radial tires, you’ve turned them into bias ply tires
__________________
Don't force it with a little hammer tap, tap, tap get a bigger hammer tap done |
04-08-2023, 02:07 PM | #8 |
Senior Member
Join Date: Nov 2010
Location: Anchorage, Alaska
Posts: 9,125
|
Re: Radial tire pressure
My Coker 19" radials say on the sidewalls: Max 44 psi. I run mine at 40 psi, works for me.
__________________
Alaskan A's Antique Auto Mushers of Alaska Model A Ford Club of America Model A Restorers Club Antique Automobile Club of America Mullins Owner's Club |
04-08-2023, 02:57 PM | #9 |
Senior Member
Join Date: Apr 2018
Location: Mebane NC
Posts: 2,414
|
Re: Radial tire pressure
If you run the car’s weight and the tire load rating through tire pressure calculators, usually you come out with 25-35 psi as the recommended pressure, depending on the body type and expected passenger weight. I did this for the American Classic 21” radials.
|
04-08-2023, 05:02 PM | #10 |
Junior Member
Join Date: Apr 2011
Posts: 8
|
Re: Radial tire pressure
Tirepressure is all about load on tire, and maximum speed used.
All not to overheat any prt of tire-material, when driving the speed constantely. So if you give tire specifications, this "pigheaded Dutch selfdeclared tirepressure specialist" will make a pressure/axleloadcapacity list, with build in reserve. Then you only need to determine the axleloads acurately and s3arch them back in my list, the most tricky part, and your responcibility. Need next. 1. Maximum load or loadindex. 2. Kind of tire to determine the maxloadpressure. 3. Speedcode, less important. |
04-08-2023, 07:07 PM | #11 |
Senior Member
Join Date: Jan 2012
Location: Western North Carolina
Posts: 4,143
|
Re: Radial tire pressure
My Fordor has a heavy metal trunk in the back loaded down with heavy tools and parts. Another heavy tool box in front with oil, coolant, and more parts. Plus all the added body insulation and tools under the seats. Did I mention there are lots of tools. With the tire pressure I run the radials still perform like radials.
Again, it comes down to heat. High temperatures can limit the life of a tire and ruin the inner tube. Too much flexing leads to too much heat.
__________________
A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past. |
04-09-2023, 09:50 PM | #12 | |
Senior Member
Join Date: Feb 2021
Location: Troutman, NC
Posts: 717
|
Re: Radial tire pressure
Quote:
|
|
04-10-2023, 08:13 AM | #13 |
Senior Member
Join Date: May 2010
Location: N. GA
Posts: 534
|
Re: Radial tire pressure
I run 35 lbs and they drive very well...
TOB |
04-10-2023, 11:16 AM | #14 |
Junior Member
Join Date: Jul 2022
Posts: 26
|
Re: Radial tire pressure
If you remember back in the olden day when radial tires first came to use in the USA they all bulged. They appeared to be low on air pressure but were not. My new American Classic radials set at the max of 35 psi also have that bulging look where the rubber meets the pavement. Have to believe modern radials have stiffer sidewalls, but not the American Classics.
|
Thread Tools | |
Display Modes | |
|
|
Sponsored Links (Register now to hide all advertisements) |
|