SRAM X4 Rear Derailleur - 789 Speed Long Cage Black CheckoutSpec= Specialized Epic (2024+) +6% in rolling efficiency vs

+6% in rolling efficiency vs Michelin Lithion 3

CINCH direct mount technology is compatible with both 1x and 2x setups

This boot is made of 100% PVC free materials

the X-10 series has always been a great option

5 and 9 watts per bearing set

SRAM X4 Rear Derailleur - 789 Speed Long Cage Black CheckoutSpec= Specialized Epic (2024+) +6% in rolling efficiency vsSRAM X4 Rear Derailleur 789 Speed Long Cage Black. Affordable and reliable derailleur is great for repairs and upgrades. Compatible with 7 8 and 9 speed systems 1: 1 shifter to derailleur actuation ratio for precise light action indexing TECH SPECS Largest Cog 34 Color Black Rear Der Shifter Compatibility SRAM 1: 1 Rear Derailleur Mount Type 10x1 Standard Drivetrain Speeds 7 Drivetrain Speeds 8 Drivetrain Speeds 9 Weight 280 Chain Wrap Capacity