and traveling backward - 12-23 cogset was common before 12-25
unfortunate it took too long
but in flat areas it was probably less of an issue (if no issue)
iff'n you wanna go way back, 1st gen DuraAce was 10 spd (I mean the THE REAL 10 speed !) crank was 53/42 and freewheel 5 spd 13,14,15,17,19, as came on my Fuji 'The Ace'. Truly a leg breaker for any road courses. We all rejoiced when 6 spd freewheels became available - Ultra 7 ? impossible !!! could it get any better ???
LOL!
Ride On
Yuri