Shimano Ultegra RD-R8000 11-Speed Rear Derailleur Model:GS Body Geometry sole construction and

Body Geometry sole construction and footbeds are ergonomically designed and scientifically tested to boost power

Weight: 240g (SGS)

approximate weight 545g

35 degree stem with strong 6061 T6 aluminum 3D forged body

shift-free fit

Shimano Ultegra RD-R8000 11-Speed Rear Derailleur Model:GS Body Geometry sole construction andShimano shadow RD construction Low profile rear derailleur design, less likely to be damaged in crash SS: compatible with 11 25 to 11 30 cassttes GS: compatible with 11 28 to 11 34 cassettes Weight: 200g (SS), 210g (GS) GS SPECS Primary Color Grey Cage GS Speed 11 Maximum Cog 34T Minimum Cog 11T RD Capacity 39T RD Spring Type Shadow RD Weight 210g Max Front Difference 16T SS SPECS Primary Color Grey Cage SS Speed 11 Maximum Cog 30T Minimum Cog 11T RD