Originally Posted by
SingleSpeeDemon
Great idea. I've always positioned the valve by tire label just because it's easy to find. It's not question of OCD, it can help you locate the posion of debris lodged in the tire after a flat.
Placing the stem at the label is a good idea as it does give you a good point of reference for finding puncture causing debris... putting the stem at the psi marking does the same thing and has that added benefit of letting people know how much air their tyres need.
I do this on all the bike I build at the shop... my own bikes usually have the valves at the label since I know what their respective pressure ratings are.