Shimano Dura-Ace RD-R9100 Rear Derailleur Bracket Axle Unit CheckoutSpec= Starfade Black and Blue Battery sold separately Rear Derailleur BK00589 Model Spike Race 33 Weight-346 Casing Durability:Durable Plus Grip Plus Compound

Shimano Dura Ace RD R9100 Rear Derailleur Bracket Axle Unit CheckoutSpec= Starfade Black and Blue Battery sold separately Rear Derailleur BK00589 Model Spike Race 33 Weight 346 Casing Durability:Durable Plus Grip Plus Compound Battery sold separately Rear Derailleur Mount Type 10x1 Standard Rear Der Shifter Compatibility SRAM eTap AXS Drivetrain Speeds 12 Color Black Chain Wrap Capacity (teeth) 40 Largest Cog 52 Axle Type 14mm Freehub Body BMX Cassette Hub Model Eclat Seismic Hub Spacing 110mm Position Rear Rim Color Black Rim Construction Aluminum Welded Depth 16mm Rim Drilling 36 Rim External Width 34mm Rim Material Aluminum Rim Model Eclat E440 Spoke Type J Bend Valve Schrader Wheel Brake Comp