Tire air pressure question?

[Rwillia4]

Wearing out in the middle of the tire? Are you applying too much pressure on the right pedal? Could it be a burn out issue?

[olddog]

Originally Posted by Rwillia4

Wearing out in the middle of the tire? Are you applying too much pressure on the right pedal? Could it be a burn out issue?

I've never had the tires loose. So far, I haven't felt the need.

[JBo]

At 14-16 pounds for street tires you should be underinflated. Never heard of an underinflated tire wearing out in the middle unless the rim width was narrow in relation to the width. jack the rear end up and put tire shine on a foot or two of the tire, slide butcher paper under the tires, lower the car and gently roll the car fore and aft. jack car back up and pull the paper out and "read" it, color or dampness should be uniform across tread. if not, accepted technology says to inflate to put more in center, delate to move to edges of tire. Less inflation allows tires to cup as the side walls expand over the sidewalls. The only kicker here is side wall construction(stiffness) could effect it as well.

[olddog]

Originally Posted by JBo

At 14-16 pounds for street tires you should be underinflated. Never heard of an underinflated tire wearing out in the middle unless the rim width was narrow in relation to the width. jack the rear end up and put tire shine on a foot or two of the tire, slide butcher paper under the tires, lower the car and gently roll the car fore and aft. jack car back up and pull the paper out and "read" it, color or dampness should be uniform across tread. if not, accepted technology says to inflate to put more in center, delate to move to edges of tire. Less inflation allows tires to cup as the side walls expand over the sidewalls. The only kicker here is side wall construction(stiffness) could effect it as well.

Now that sounds like a technical way to know you have it right.

We use carbon paper on white paper at work on rubber nip rollers. It works well. So why didn't I think of this?

They also sell a pressure sensitive paper that changes different colors for different pressures. More expensive, but very interesting. I have seen adds with pictures where they used it on an engine head.