Originally Posted by dmcd
I'm afraid I trust my friend/tyre supplying/mechanic more than I trust you, so, I'll just play it safe for a couple miles if you don't mind.
You trust your friend more than Lance Holst former professional AMA racer, Nicky Hayden/Jason Pridmore manager who also helped set up Kevin Swantz Riding school?
As well as the Service Rep for Pirrelli?
You really want a treat go to a race track sometime, you get to see lots of brand new shiny tires, some with a sticker on.
FYI I hvae a very close friend whom I consider an Amazing Mechanic who perpetuated this myth just like your friend.