Originally Posted by The Golden Boy

Duopars are awful, unreliable, fragile, quirky, require the unobtanium tabbed washer, display a stunning probability of catastrophic failures, require an unobtanium propriety upper pulley, can’t safely roll backwards, have 2 parallelograms- either one, the other or BOTH can go out of alignment because of the cheap manufacturing, even the titanium looks cheap. And Suntour self destructed trying to chase the Duopar- despite that ANY **** ty cheap, low end Suntour derailleur being better than the Duopar.

“Oh the Duopar will take a 38T cog.” Really. When have you ever used a 38T cog? When have you even WANTED to use a 38T on an old bike? A Suntour XC will do a 38T cog- with none of the potential drama. I’ve personally used Shimano M735 and MT-60 and Suntour XC Pro and XC Comp on 34T cogs. All those were world class units- SIGNIFICANTLY less expensive, significantly more durable, index compatible- and they didn’t look like a cheap stamped derailleur. Plus, even a cheap ATB derailleur would work as well. I’d like to test out a V-GT Luxe and see if that’ll do a 38.

I get that it was a miracle of modern innovation, I get that it was an obscenely expensive component that only the fancy people knew about, and I get that there are serious cyclists that have put more miles on one Duopar than I’ve ever even ridden- period...

There’s just no reason to taunt fate with all the potential catastrophic failures that the Duopar presents.

And the the same thing goes for the clowns who search out and install 1st generation Mountech rear derailleurs.