tire pressure

[gtxrt]

what would be a good tire pressure ? coronet rt 215/70 r-15 with radial tires and manual steering. I need easy steering and leaning towards a soft ride. They used to say more air in front tires for better handling not sure if that is true.

 

[Bird 426]

For my money, 32 lbs, minimum. You have a lot of sidewall. With manual, you have to think ahead, car should be moving when you turn the wheel.

 

[dadsbee]

Radials, just do what it says on the tire. Bias ply 30 front... 24 rear.

 

[WileERobby]

32 psi all around.

 

[oldbee]

Personally, I’m at 40#front and 35rear.

 

[Cranky]

what would be a good tire pressure ? coronet rt 215/70 r-15 with radial tires and manual steering. I need easy steering and leaning towards a soft ride. They used to say more air in front tires for better handling not sure if that is true.

What engine do you have and does the car have factory AC? I ran 235/75-15's all the way around on my 66 Belvedere mounted on 7" cop car wheels and ran 32 psi on the front and 28 in the rear. My car was a /6 with factory AC and manual steering. The car started out at 3370 but over time, it got down to 2950. I was 235 at one point. I also lowered the car nearly 2", added all the caster I could get plus a lot of camber. I'm not Hercules but the steering wasn't at all difficult.

 

[#41]

That's kind of a mixed bag of questions and goals. The best tire pressure for handling depends on spring rates, what kind of driving and handling, etc. ... lots of factors. In general, I start at 32 in the summer and up it to 34 in the winter. I check tire wear and adjust up or down over the lifespan of the tire depending on how the tires wears.

For easier steering, up the tire pressure in the fronts to 38+. Check the tire sidewall for max pressure and stay 3-4 psi under that to allow for heat pressure build. A side effect is that your tires will wear more in the center and you won't get as much life out of them.

 

[R413]

I run 38 and 35 in b bodies Heavy full size C body car with all the goodies I run 45 in front and 40 in rear or it plows in corners and edge wears the fronts. Ride feels better with more air.

Play around with the tire pressure and see the changes, it doesn't cost anything. Under inflated tires are not good, possibly dangerous.

Many factors, how you drive, speed you drive, car weight, spring rates, etc. The more air the better for me. New radial tires have max press 44 and 51.

Soft ride? What car? What springs and shocks?
New tires ride better and are quieter than old tires.

 

[gtxrt]

440 cubic inch dodge coronet RT. stock RT springs 7 leaf on pass and 6 on drivers. kyb stock cheaper shocks just took off the Monroe that hit the bumps harder. new cooper cs5 ultra touring tires. I will try more pressure I was at 27 front 26 rear. so any benefit running 2 more lbs in the front tires over the back tires ?

 

[R413]

What is the max press on the sidewall. Fill the tires up! Experiment with it. Front of car is heavier so may it need more air, more air in rear can make them spin easier.

You results may vary, try different pressures and let us know what works.

 

[RJRENTON]

what would be a good tire pressure ? coronet rt 215/70 r-15 with radial tires and manual steering. I need easy steering and leaning towards a soft ride. They used to say more air in front tires for better handling not sure if that is true.

What does the tire's sidewall information say? IMO.....inflate to achieve published load rating, when the tire is COLD.....lower inflation pressures will yield softer ride but reduced traction and overall tire life.....
BOB RENTON

 

[lewtot184]

I use 32-34 in my 69 r/t with 235/70x15's. I wouldn't do less than 32.

 

[Billccm]

Wow! What a range and variation!

I've run 36psi in every car I've ever owned since 1986. Local mom and pop tire shop that sold Remington tires always put 36psi in the tires.

 

[RJRENTON]

Wow! What a range and variation!

I've run 36psi in every car I've ever owned since 1986. Local mom and pop tire shop that sold Remington tires always put 36psi in the tires.

My father in law listened to the same B.S. that a mechanic told him to over inflate his tires on his SUV, to at least 36 -38 psi for a smoother ride. I was following him in my SUV and at ~ 65 MPH on a dry sunny Interstate highway, the left rear on his SUV, tire EXPLODED (the SUV was new with less than 7000 miles on the odometer) ..... tearing up the fender, fender well, body molding, chrome styled wheel......to the point of almost loosing control of his SUV, b4 coming to a stop on the side of the road. Did approximately $5k BODY damage to the SUV.......MORAL OF THE STORY......DON'T LISTEN TO THE B.S. proclaimed by others, including your best "buddy".....for they know nothing....and inflate your tires to the placard on the door jamb of the owner's manual or FSM.....BUT NOT TO EXCEED THE STATED PRESSURE ON THE TIRE'S SIDEWALL.....or do so at your own risk and suffer the consequences.......
BOB RENTON

 

[BSB67]

Radials, just do what it says on the tire.

Huh? That’s crazy.

 

[gtxrt]

i put in 32 in all 4 tires to start with. Friday have to go get front end alignment i will see how it drives there and what the specs are. had it done before but now with a little taller tire and was messing with height of the front end i think it is toed out. at about 90 mph it starts getting squirrelly and at 100 mph gets a little scary. this shop as the laser the last shop just does it like they did it 50 years ago. I will update on Friday.

 

[R413]

Here we go again! Sorry Bob, that 58 year old tire placed IS WORTHLESS today. Go ahead with 24 psi on a 3800 lb car with a modern radial and see when you end up. LOL. Talk bout BS suggestions!

And very common for manufacturers to put the cheapest tires on new cars. They wear out with few miles, ride like crap and make noise. Put a good set of tires on there and it changes the car.

That SUV tire would have exploded anyway.

 

[Billccm]

From Pirelli tire:


Running your tires at the correct pressure is important because it keeps you safe, cuts down your gas bill, and makes your tires last longer. Each vehicle has its own specifications for tire pressure, but most fall between 28 and 36 PSI (pounds per square inch).

 

[Billccm]

From Discount tire:


Discount Tire's standard load for tires is 36 pounds per square inch (PSI). However, the recommended tire pressure for a vehicle depends on the size of the car and its tires. For example, small cars are usually 30 PSI, medium-sized cars are 36 PSI, and large cars are 42 PSI.

 

[RJRENTON]

From Discount tire:


Discount Tire's standard load for tires is 36 pounds per square inch (PSI). However, the recommended tire pressure for a vehicle depends on the size of the car and its tires. For example, small cars are usually 30 PSI, medium-sized cars are 36 PSI, and large cars are 42 PSI.

Personally......I'd be looking for a new tire vendor. I use what the tire manufacturer recommends not the supplier or installer .....
BOB RENTON