Not to throw any more crap into the mix, but on my 03 America there is a sticker on the right side of the frame below the tree that lists the tire pressures. That may not exist on the newer bikes, I don't know.
On the older America's with the crappy Bridgestone snow tires, 31f/31r worked o.k. because the tires were so stiff.
With Avons, I went with 32f/34r.
On a Speedmaster with the Metzlers (tubeless) in the replies I've read on here about tire pressure over the years it's always been a few pounds higher than the Americas. 30/31 just sounds too low.....
