Tire Pressure on a 1941 Cadillac Fleetwood 75 Imperial Town Sedan

[d1jab01]

I have a 41 Cadillac Fleetwood Imperial Town Sedan and the car has Coker Classic 750R16 radial tires installed. The recommended tire pressure is 41 PSI but the tires still have quite a bulge in the sidewall. Anybody have any experience with the maximum tire pressure I can use without compromising the safety of the tire. I talked to Coker and they suggested the forum to see if anyone has safely run higher tire pressures on the limousines.
Thanks.

[The Tassie Devil(le)]

G'day Jim,

Someone with more knowledge than me should pop in soon, but radial tyres will always have a bulge, no matter what pressure you pump them up to.

As for what pressures?   Well, the rule of thumb was always about 4 Psi over what was recommended by the vehicle maker for the standard cross-ply tyres.

The only time I have varied from the above is when driving long distances at the speed limit of the road, and then I will pump up another 4 Psi.   But, with the '72 Eldorado that I own, I refuse to set the tyre pressures to what the factory says on the decal  (17 psi Rear and 24 psi Front.)

Bruce.

[d1jab01]

Bruce,
Thanks for the reply. I'll see how they look and ride at 45 PSI.
Jim

[Jon S]

Who recommends pressure of 41 lbs?  Coker, the sticker on the car for bias ply tires?  I wouldn't put more than 35 lbs in radials.  JMHO

[Richardonly]

Does sound on the high side.  Wish I could add more.

Over inflated may be worse than underinflated.

[Bill Ingler #7799]

It has been my understanding that the tire pressure you see imprinted on the side of any tire is the max pressure that is recommended for that tire. So to run a tire with air pressure above what the manufacture says for that tire, places all the liability back on you if that tire fails. Other than good brakes on a car, I also want to run a good set of tires.   Bill

[harry s]

SKU:   62246 
Tread Width:   6.40 
Section Width:   8.00 
Overall Diameter:   31.14 
Max Load Capacity:   2150@41PSI 
Recommended Rim Width:   5.00 - 6.00 
Tube Type or Tubeless:   Tube Type 
Availability:
This is from the Coker site. As you see the 41# max psi is at 2150# of weight. The weight at each corner of your 75 Series would not be near that so a lesser pressure should be used. Several years ago I had the same dilemma with a pickup truck running E load range tires. I contacted Michelin and they  had chart with guidelines  for TP when not loaded to capacity. I would start at 35# and experiment from there but would not go much over that for all the reasons stated and also from a wear stand point. With over inflation you wear the center of the tread. Good Luck,     Harry

[joeceretti]

Those tires should bulge. How much are they bulging? Can you post a photo?