2009 Limited V6, P265/60R /18 Firestone Destination LE2

[JCSTEW]

Advice on best cold tire inflation PSI for a 2009 Limited V6, P265/60R /18 Firestone Destination LE2 Tires. I also still have X-Res Shocks as well. I am running with about 33 PSI cold inflation. If run the the pressure at 35 PSI I think the tires are bit more quieter over the road. Any a advice on the best tire pressure for best ride and least amount of road noise ? My previous tires were the Michelin Cross Terrain Tires and they were quieter even with 32 PSI cold inflation. Thanks for all your help.