In regards to the horizontal dropouts; what is the "correct" position for the rear wheel? As long as I have been around bikes, I have always moved the wheel as far back in the dropout as I could. But, others have made mention of "your wheel is too far back"; and the adjustment screw found in some implies that it should not go all the way back.

So where should it go? As an experiment, I moved my rear wheel to where it was at the intersection of the seat and chain stays, and it is easier to shift onto the largest rear cog when the chain is on the big chainring (it is an early 70s ten speed.)

-James