OK, I keep reading all over the internet and on this site that people claim they can inflate their tires anywhere from 6 PSI or more over the door placard and still achieve even tire wear. I have used the following tires recently and/or currently:
1) 215/50/17 michelin MXV4 placard called for 32 PSI
2) 215/50/17 Yokahoma AS530 placard called for 32 PSI
3) 225/75/15 Generals placard called for 30 PSI
4) 225/75/15 Cooper H/T Discoverers placard called for 30 PSI
5) 205/55/16 Bridgestone EL400 placard called for 36 PSI
For every tire listed I have typically maintained 2-4 PSI over the door placard at COLD. I would check tire pressures first thing in the morning once a month or so. The temperatures where I live vary from 0F to 105F, so I have to constantly check pressures as the seasons change.
Having maintained these pressures, I have experienced fairly drastic increased center tread wear on every tire. This is observed by measuring the channel depths across the tires. The center channel is always much more shallow than the outside channels after 15k or so. I'm still getting 50-65k miles out of the tires, but it still bothers me it is doing this.
What am I missing? Am I doing something wrong or is it just the size and type of tires I have that don't allow me to over-inflate?
1) 215/50/17 michelin MXV4 placard called for 32 PSI
2) 215/50/17 Yokahoma AS530 placard called for 32 PSI
3) 225/75/15 Generals placard called for 30 PSI
4) 225/75/15 Cooper H/T Discoverers placard called for 30 PSI
5) 205/55/16 Bridgestone EL400 placard called for 36 PSI
For every tire listed I have typically maintained 2-4 PSI over the door placard at COLD. I would check tire pressures first thing in the morning once a month or so. The temperatures where I live vary from 0F to 105F, so I have to constantly check pressures as the seasons change.
Having maintained these pressures, I have experienced fairly drastic increased center tread wear on every tire. This is observed by measuring the channel depths across the tires. The center channel is always much more shallow than the outside channels after 15k or so. I'm still getting 50-65k miles out of the tires, but it still bothers me it is doing this.
What am I missing? Am I doing something wrong or is it just the size and type of tires I have that don't allow me to over-inflate?