For what it's worth, I put the Nokian Outpost nAT 275/60/R20 P-metric on yesterday and don't find them loud, and don't have any vibration even at 75mph. I'll see if anything untoward develops as time goes on, but on first report - I like them.I'm wondering this as well. I'm coming from a Silverado with DuraTrac Wrangler RTLT so I can't imagine them being louder.