FWIW, I read some advice a while back that the air pressure in the tire should rise by 3 psi from cold after 30 minutes of highway riding.I bought the Shinko 230's I installed the front last night.. The side of the tire is rated at 41 psi and I put in 32.. I'm also using Dyna beads. I was wondering what speed I might feel something wrong with the balance if it has issues.. I took her up to 50-55 when I got done and it feels fine so far.