Model Number RD-7900
Series DURA-ACE
Cassette Compatibility 10-speed
Maximum Sprocket 28T
Minimum Sprocket 11T
Maximum Front Difference 16T
Total Capacity 33T
Guide Pulley sealed bearing
Tension Pulley sealed bearing
Bracket Body cold forged aluminum/anodized
Bracket Pivot Seal double O-rings
Plate Body engineered plastic/painted
Plate Pivot Seal single O-ring
Outer Link cold forged aluminum/anodized
Inner Link cold forged aluminum/anodized
Link Pin Bushings fluorine coated (4)
Outer Plate carbon
Inner Plate carbon
Average Weight 166g