Vision Metron rear derailleur is made of thermoset carbon fiber construction.
Full carbon B & P knuckles, parallelogram and inner and outer cages
135grams.
Zytel composite pulleys with ceramic bearings, and titanium hardware.
Compatible with Shimano ST-7900, SL-7900, SL-BS79, ST-6700, ST-5700, ST-7800.
