Originally Posted by
PimpMan
wonder whats the great advantage you get from one extra gear?
For me and my vintage road bikes, it's about new freewheel availability. The really nice all-chrome Sunrace 7-speeds are easier to find than the 6-speeds.
There's also probably some advantage to having the closer gear ratios. But there may be a disadvantage to the slightly greater wheel dish due to the wider hub spacing.