What tire pressures are people using for the Kumho 165-80/15 tires? The manual for my car recommends 20 front/25 rear or 25 front/30 rear for high speeds. For old tires, Dunlop SP20's, I had been running 25/30 but the Kumhos feel like they are over inflated at that pressure. Should I drop down to 20/25? Thanks, Peter Schauss 1963 BJ7 1980 MGB