PS4 Uneven center wear?

[MerlintheMad]

Even wear of course is the goal. But if one were to err on the side of one or the other, I'm thinking I'd rather have a few pounds too many than too few. Stiffer sidewalls are less prone to injury in hard cornering. And certainly an over inflated tire is going to not get pinched, or the rim dinged in, from hitting a pothole or similar hazard; at least it will take a lot more impact to do damage: where as an under inflated tire will be the opposite and invite a damaged rim and destroyed tire. I can't think of any real world reason for tempting under inflation.

So I will answer my own question and say that my tires will remain at or slightly above the OE psi specs on the door card. Right now they are two to three psi over. My cold psi is currently 40 front and 37 rear.

 

[Revvdmedia]

Even wear of course is the goal. But if one were to err on the side of one or the other, I'm thinking I'd rather have a few pounds too many than too few. Stiffer sidewalls are less prone to injury in hard cornering. And certainly an over inflated tire is going to not get pinched, or the rim dinged in, from hitting a pothole or similar hazard; at least it will take a lot more impact to do damage: where as an under inflated tire will be the opposite and invite a damaged rim and destroyed tire. I can't think of any real world reason for tempting under inflation.

So I will answer my own question and say that my tires will remain at or slightly above the OE psi specs on the door card. Right now they are two to three psi over. My cold psi is currently 40 front and 37 rear.

I recall a local company that has open track days also noting that running on the over inflated side was better than underinflated as under is more prone to blowouts in track driving. I would surmise this should generally mean a bit over is safer than under.

 

[Manaz]

I recall a local company that has open track days also noting that running on the over inflated side was better than underinflated as under is more prone to blowouts in track driving. I would surmise this should generally mean a bit over is safer than under.

On the WRX STI I have access to, we run the 235/40R18 tyres (Adrenalin RE003s) at 36psi on the road. If we do wet track days, we run the same tyres as a wet weather tyre (semi-slicks aren't good in the wet), and we run them as low as 24psi (and on some tracks, we have a pressure variation from side to side as well).

Why? One reason is that on a road, pressures might vary by 10% from cold to hot. On a track, the variation can be much more significant. And under-inflated is generally better for lateral grip than over-inflated, and cornering speeds determine times on shorter, tighter, more technical tracks.

I can't imagine any track where higher than stock pressures are sane, or in fact where I'd run even stock pressures.

 

[Revvdmedia]

On the WRX STI I have access to, we run the 235/40R18 tyres (Adrenalin RE003s) at 36psi on the road. If we do wet track days, we run the same tyres as a wet weather tyre (semi-slicks aren't good in the wet), and we run them as low as 24psi (and on some tracks, we have a pressure variation from side to side as well).

Why? One reason is that on a road, pressures might vary by 10% from cold to hot. On a track, the variation can be much more significant. And under-inflated is generally better for lateral grip than over-inflated, and cornering speeds determine times on shorter, tighter, more technical tracks.

I can't imagine any track where higher than stock pressures are sane, or in fact where I'd run even stock pressures.

Maybe it was a matter of the verbiage, I'd have to re-read it. Maybe it was more implied that those who choose to underinflate the tires for track days should not be too aggressive with it and stay on the higher side.

 

[Manaz]

Tracks are generally pretty forgiving places in terms of road surface. Maybe it's not a great surface there?