Max tire pressure - Need some clarification

[JackBurton]

Ok, so my rule of thumb is 5 lbs less than the max rated tire pressure displayed on the side wall of the tire. So in my case, 50 psi max and I inflate it to 45 psi. I've always followed this rules but never questioned if it was actually correct. Anyway, does this sound right to you guys?

This looks like a plain troll post to me and I cannot see this having any real merit. This is not ATOT and will NOT become a nef fest or "max sidewall" joke thread. If you care to explain yourself, please do so via moderator discussions and i'll consider opening this back up, but this is EXTREMELY unlikely.
AT MOd
Gillbot

 

[herm0016]

no. go by your manufactures rec. usually on the door jam or owners manual. what car and what rating of tires?

i run about 35 in my p rated tires on my 1/2 ton pickup. max is 60 or so psi.

how are your tires wearing?

 

[LTC8K6]

Is there some reason for not doing what the mfg of the vehicle specifies?

 

[JCH13]

I like a little bit above my MFG spec, I typically go 2psi above for normal driving, it sharpens up response without sacrificing ride too much.

 

[satyajitmenon]

I like a little bit above my MFG spec, I typically go 2psi above for normal driving, it sharpens up response without sacrificing ride too much.

Same here.

InB4 max sidewall blah blah...

 

[JackBurton]

no. go by your manufactures rec. usually on the door jam or owners manual. what car and what rating of tires?

i run about 35 in my p rated tires on my 1/2 ton pickup. max is 60 or so psi.

how are your tires wearing?

Car is a 2011 Mustang GT with Pirelli P Zero tires rated for 50 psi max. I'll have to take a look at my manufacture's suggested pressure. I never looked because I always went by the sidewall.

 

[waggy]

where is fleabag?

 

[5150MyU]

Rule of thumb is what the vehicle calls for-unless it is a truck-80psi in the rear-irritating and does little to extend tire life, unless it is loaded all the time.
Talk about a rough ride.

It's all about tire wear, comfort, and fuel mileage.
And if you don't check your tire pressure at least once a month, just make sure you have some air in them.:;

 

[herm0016]

80 psi in a semi truck?

even our f350s don't require that much pressure!

 

[Aikouka]

Doesn't that cause uneven tire tread wear?

 

[Demo24]

Doesn't that cause uneven tire tread wear?

Yes, the tire's effectively balloon up so the inside wears out significantly faster than the rest of the tread. Also does not help with grip since the tire is not properly contacting.