Shimano OT-RS900 Derailleur Cable Housing, 11-Speed Shadow, Dura

The Shimano OT-RS900 Derailleur Housing Loop is a specialized section of derailleur housing designed specifically for Shimano Shadow-style road rear derailleurs. Measuring 170mm in length, this flexible housing loop allows proper cable routing into the derailleur adjuster while maintaining smooth shifting performance.

Unlike standard derailleur housing such as OT-SP41, the OT-RS900 is engineered with greater flexibility to accommodate the sharper entry angle used on Shimano’s 2nd generation 11-speed road Shadow derailleurs. This design helps reduce cable drag and improve shifting precision, particularly on high-end road drivetrains.

The OT-RS900 housing is compatible with both Shimano polymer coated and Optislick shift cables, making it the correct replacement housing section for many modern Shimano road setups.

• Specialized derailleur housing loop for Shimano Shadow rear derailleurs
• Designed for 2nd generation Shimano 11-speed road drivetrains
• Extra flexible housing accommodates derailleur entry angle
• Helps reduce cable drag for smoother shifting
• Compatible with Shimano polymer coated and Optislick cables
• Ideal replacement section for high-performance road drivetrains

• Brand: Shimano
• Model: OT-RS900
• Type: Rear Derailleur Cable Housing Loop
• Length: 170mm
• Color: Black
• Weight: Approx. 9.8g

Designed for Shimano Shadow-style 11-speed road rear derailleurs, including:

• Dura-Ace R9100 series
• Ultegra R8000 series
• GRX RX800 series
• 105 R7000 series

Compatible with Shimano Polymer Coated and Optislick shift cables.

• New – NON-retail packaged
• Genuine Shimano product
• Includes only what is shown in photos

A specialized derailleur housing designed to maintain smooth, precise shifting on Shimano Shadow-style road drivetrains.