I was having issues with getting the 15K miles per set of rubbers I
wanted last few sets, so I really started paying attention to the crappy
job of checking the pressures. I have to admit that they almost never
need air. The service guys must do a good job cleaning the beads.
They're never down. I ride an Ultra, so the rear is always a lay down
and wheel only in one spot job. Also never found what I consider a good
chuck to fit on the valves with the location they're in. I wish I could
find an easy screw on that didn't seem to leak a pound or so once you
unscrewed it, kinda like the HD shock absorber air filling tool. That
just works good.
Anyway, only getting about 7K to maybe 10K on a set of tires before they
whined so bad it worried me, I finally figured out I was probably
between 1-2 pounds lower on what I thought I had in the tires, than what
was actually in there. Now, I just fill them to 2 lbs. over what I
want. Alas, I got 15K out of the last set. Now I admit, they were damn
noisy at the end and that stuck feeling was going away, and it did worry
me, especially since the wife insists on going with all the time, but I
did get 15K.
The good thing about getting that many miles on too, is when you get a
new set you think you got a sportbike under you. Last couple months
this year were on new rubber and what a difference in making the ride
enjoyable. So much, I don't know if I'll worry about it much anymore.
If they start whining and don't feel so secure, change 'em out. Screw it.