The RX2 is a high-specification short-cage rear derailleur for road bikes.
Clean lines of a vintage derailleur with all the function and form of a modern piece of engineering.  Designed to work with 9/10 speed Shimano compatible indexed shift levers using a cable pull ratio 2:1 or with the more traditional friction-type (non-indexed) shifters. 
A stylish option for any retro or retro-inspired build.
Features
Light & strong cold forged alloy body with a high polished finish.
CNC Alloy jockey cage.
Smooth-running sealed bearing CNC 7075 alloy jockey wheels (11T). 
Lightweight 7075 alloy mounting bolt.
2:1 cable pull ratio (Shimano 9/10 speed compatible).
Technical specification
Max rear sprocket 28t
Min rear sprocket 11t
Rear capacity 17t
Max front difference 16T
Total capacity 33t