X01 DH Type 2.1 (10-Speed):~ The 10-speed X-HORIZONª rear derailleur makes shifting smooth and reliable no matter where you ride. Engineered to maintain consistent chain gap across all seven gears, X-HORIZONª eliminates vertical movement for faster shifting, reduced shift force and an end to ghost shifting.
• X-HORIZONª technology provides more responsive shifting and eliminates ghost shifting, a common problem on DH bikes
• EXACT ACTUATIONª variant allows upgrades to existing bikes in the aftermarket
• ROLLER BEARING CLUTCHª with CAGE LOCKª sets the industry standard