Leonard Bulger wrote:
> The Duopar shifts really well over combinations nothing else will work
> with, but it's fragile. If you back up the bike with a crossed chain,
> it will bend nearly every part in the derailleur, The double sprung
> Rally shifts adequately and is much more robust. My dream derailleur
> would work like a Duopar and be built like a Nuovo Record,
I've not had a problem with durability with my Duopars -- 3 in service here, including the original Eco model I bought back in 1978 still paying its way on my daily commuter bike. They've all seen plenty of abuse, but none have failed. The ones I photographed are new ones I picked up while at Trek (almost 20 years ago now!) but never put into service.
--
John (john@os2.dhs.org)
Appleton WI USA