Shimano Ultegra 6600 Rear Derailleur - (Road Derailleurs)

Short cage, compatible with double craksets. For use with 9 and 10 speed drives by changing cable mount positions. A wider outer link with increased rigidity allows this derailleur better shifting. A cold-forged aluminum body and a 11 tooth sealed cartridge bearing pulleys reduces both wear and friction to all moving parts. 209 grams. FREE Shipping within the Continental USA!