microSHIFT ADVENT X Rear Derailleur 10 Speed Medium Cage Black With Clutch CheckoutSpec= Axial Color Red Ring Position Type Chain Color Red Ring Position Type Chain Retaining Single Ring Tooth Count 36 Drivetrain Speeds 9 Drivetrain Speeds 10 Drivetrain Speeds 11 Drivetrain Speeds 12 Chainring BCD 104 Material Aluminum Defined Color Red Waterproof (IPX7 waterproof to 1 meter for 30 mins) Rear Derailleur Mount Type 10x1 Standard Rear Der Shifter Compatibility microSHIFT ADVENT X Cage Length Medium Drivetrain Speeds 10 Weight 313 Color Black Designed for ebike Yes Chain Wrap Capacity (teeth) 40 Largest Cog 48 Larger pulley and taller teeth for better chain security and higher ride height