Shimano SLX Dyna-Sys RD-M663 SGS 10-Speed Shadow Rear Derailleur
Shimano's wide gear range Dyna-Sys technology and low-profile Shadow design are now available in the hard-working SLX rear derailleur. Like its XT cousin, it's lighter, smoother-shifting and optimized for use with Shimano's 10-speed cassette and narrow chain.
- Low-profile Shadow design tucks derailleur close to the chainstay to help prevent damage from contact with rocks or other trail obstacles
- Redesigned cage and pulley are optimized to deliver smooth and precise gear changes
- Long-cage design provides wide gear range
- Compatible with 10-speed Shimano components only