The Shimano OT-RS900 shift cable housing is required for Dura-Ace RD-R9100, Ultegra RD-R8000,
105 RD-R7000 and other current 11-speed road or gravel rear derailleurs.
The reason for this is the smaller radius that results when routing the cable from the frame to the rear derailleur, which cannot be created with the stiff standard OT-SP41 cable housing. The OT-RS900 is 24
Specifications:
Application: Road, Gravel
Diameter: 4 mm
Length: 240 mm
Recommended Cable Diameter: 1.2 mm
pre-lubricated with special silicone grease to ensure smooth shifting
