Nokian 215/55 r17 98v xl tires purchased jan. '09 for 2005 lexus es330 do not hold air. factory tires they replaced held air w/o problems. tire dealer, borst tire centers, 3361 so. thompson st., schenectady, ny 12306, attempted 3 times to correct, blaming loss of air on corrosion of the rims. on 3rd attempt ground off the "corrosion" but little or no improvement resulted. must add air 2x weekly. *tr