About this item

• TX models come with Smart Cage which gives MegaRange compatibility with a shorter derailleur cage
• Double Servo enables the guide pulley to track the cogs closely while moving front to back, optimizing each shift
• Designed to keep the rear derailleur guide pulley at an optimum distance from each sprocket for accurate SIS shifting
• 13t upper and lower pulleys
• Compatible with HG 6/7/8 speed chains