[AndrewJ]

I've been running my tires (rated 35 front / 45 rear) at about 60psi front and 65 rear for several months.

For any n00bs attempting tire overinflation, do so at your own risk. Keep a careful eye on your tires, inspect them regularly, and increase your tire pressures gradually (5psi every couple of days till you hit your mark)

And for anyone worried about overinflation, have you ever rented a U-haul? Every U-haul trailer I've ever rented has had MASSIVELY over-inflated tires. It's no scientific proof or anything, but if it's good enough for rental vehicles that see hundreds of thousands of annual miles of abusive service, it's good enough for me.

Once again, that's just one mans opinion. Oh, and overinflate at your own risk.