Increased rigidity with less weight
Wider bearing positioning
Rigidity is enhanced and pedaling force is efficiently transmitted
Precision Bearings
Low maintenance and simplified installation
The SHIMANO RS900 Shift Outer Casing helps ensure smooth shifting action of the rear derailleur thanks to its superior construction and materials.
The SHIMANO RS900 Shift Outer Casing helps ensure smooth shifting action of the rear derailleur thanks to its superior construction and materials.