Looking for a part. Does it exist?
 

I have a cyclocross bike that has top tube mounted cable braze ons. I cannot find a top swing derailleur that will go up to a 50T chainring so I got a bottom pull one. The part I am thinking of would be a clamp that will accept a pulley mounted below the derailleur so I can use the bottom pull. Some mountain/cross bikes have the proper braze on for the pulley. My bike has no braze on. Is there such a clamp?

such a thing exists, and I bought one, but never ended up using it. you can get it a cyclocrossworld.com (if I remember straight), or buy it from me next time you are in NYC.

generic,

Thanks I do see it on cx world. Sheesh for $25 bucks too! Well I wont be in nyc anytime soon but if you dont need the thing and its for a 31.8mm post then maybe we can work something out via mail...