The Shimano Ultegra R8000 11-Speed Derailleur, modeled after the Dura-Ace R9100, offers extended gear ratios of up to a 34 tooth cog (Medium Cage). The smooth and quick shift performance punches above its weight class. The derailleur features the Shimano Shadow RD design, which gives it a sleeker and lower profile. 

Features: 

• Shimano Shadow RD low-profile design
• Pulley maintains consistent distance to cassette for increased shift stability
• Maintains smooth, compact appearance
• Stable shifting performance
• Pulley follow-up in certain distance
• SHIMANO SHADOW RD construction
• Race endurance for less damage in crashes
• Adapted for race specific frame design

Specifications:
Speed: 11 Speed
Shifter Compatibility: Shimano Road (11 Speed)
Shift Mechanism: Cable Actuated
Max. Tooth: 30T (Short Cage), 34T (Medium Cage)
Min. Tooth: 11T
Chain Wrap Capacity: 35T (Short Cage), 39T (Medium Cage)
Cage Material: Carbon/Aluminum
Chain Retention: Shadow
Color: Black