I currently have a 12-21 7-speed Dura-Ace freewheel on one of my bikes. I'd like a gear a little lower than 42x21 for long, hilly rides. Ideally, I'd like a Dura-Ace 13-26 or 13-24. If I can't find one (how often do they come up on eBay?), are Nashbar and Sunrace freewheels (13-24 both) of good quality? Are they greatly inferior to Shimano and Suntour?
Thanks in advance.
Mordecai Silver
NYC