General air pressure question when inflating tires.

I have never heard this spectrum of the issue brought out. Now that you have brought it to my attention - it makes sense.

I have stayed away from Firestone tire for decades cuz of experiences had in the past; long B4 the Explores crisis. I recently acquired new Firestones for my three vechicles from my local dealer. I got a good price and the dealer is in my neighborhood. I figured I'd give them another try. I like the tires on my Buick Lucerne and Comet. The ones on the Windstar are another matter -- Too noisy.
I suppose 2 out of 3 is not so bad.

 

We have an '07 Mustang with the Pirellis, and saw the higher pressures that the tires are allowed. I discussed this with a few folks and it all fell back to "run them at 32 lbs like on the tag".

28K miles on them and they still look pretty good, but just rotated them because the front wears them harder than the rears and it was starting to show. I really don't expect more than 40K miles out of these, due to these being more of a handling-oriented tire, but I may be surprised.

 

Is 32 the recommended pressure, regardless of rim and tire size?

hers were originally 225s on 16" rims, but now she has 235s on 18" rims, and much lower profile.

I got her these...http://www.bfgoodrichtires.com/tire-selector/name/g-force-t-a-kdw-tires

 

That is with 235/55/17s . Don't know if 18s make a diff.

 

I think we have 235/55-18, I doubt it would make much difference to have a 1" difference in rim.

OK, I will go out there and re-adjust them.

It thought 40 psi was quite high (which is why I started this thread). i was afraid maybe the higher performance, higher speed rating tires needed more psi in them.

 

Exp?

Man have you really got an EXP? I haven't seen one of those in a Long time. They might just be more rare than Mavericks. I had an 83 for a short time in the late 80"s. and I thought it was a great little car. That is until my then girlfriend tried to drive it under the back of a dump truck.

 

My 300m runs 245/45zr18 factory. I find it works best around 36psi. Any higher and it rides too hard. Any softer and its floaty. Also the rims come into consideration with the lower profiles. Dont want the tire too low in pressure or its even easier to damage the rim on potholes etc.
You dont want any higher than needed pressure in those BFG's. The last thing you want with that tire is for it to be bouncing and hammering the road. That tire is real sensitive to the tread blocks scalloping and getting noisy. High pressure, weak shocks etc. exaggerates it. That tire needs good align,good suspension components,proper pressure and regular rotates to minimize the scalloping.
You may find 32 is too low. I would try around the 35-36 mark and see how it feels.

 

Door jamb says 35, I used to run 37, so I lowered it back down around 36-ish.

Then saw this, AGAIN. Always worried me how close this clearance is, but these are Mustang tires on a Mustang, and have had no problems yet!!!

I often wonder if I should put a 1/8" spacer in there...

There is literally 1/16" or less between the rim and that caliper. NOT an optical illusion.

Anyone else have these bullitt rims to verify that this is normal? (Not really the caliper but the part on the inner side nearer the hub)

I will have to scope out some cars in the parking lot today and see if this is normal. The guys at the tire shop didn't seem too concerned.

 

Yea, my wife and I both miss that little car terribly. Awesome to drive. I regret selling that thing every time I put gas in my Expedition!:16suspect

 

The caliper isnt an issue Scoop. Lots of room. AS the pads wear the caliper will move away from the wheel anyhow. Wheels not hitting that caliper support bracket is it?? I worked on an SRT8 300c today and the wheel is even closer to the Brembo caliper than yours is. No issues.

Not relative but one new rim,4 tires and front and rear pads and rotors.... Ready for this $4300 bucks plus tax. 900 bucks in Brembo pads. Ouch!!!
Hes fixing it without a second thought. Of course it could be done much cheaper but he insists on factory parts. Tried to explain the brakes arent Chrysler anyhow. Hes about 75 years old and drives this SRT8. Hes trading it in a few months. Might be a good family car for us.

 

It isn't the caliper I am concerned about. It has a good half an inch. It is that other item to the right of the caliper. only 1/16" or so, maybe less.

Update on wife's driving experience...she said it was quite stiff with the 40 psi, and much nicer now that it is down to 35-36-ish range.