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Aluminum Cassette Technology Hyperglide Cassette Weight 208g (11-23T) Cog Material Steel Finish Nickel plated Speed 10
After three years of development working with the fastest racers at the World Tour level
Cassette Technology PowerGlide Cassette Weight 220g (11-23T) Cog Material Steel Range 12-26T Speed 10
30c is the fastest on smooth paved roads at higher speeds
Light up the dark with the built-in LED flashlight
Ultegra RD-R8000 Capteur de puissance Aluminum Cassette Technology Hyperglide CassetteShimano 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) Attributes Max Front Difference 16T Minimum Cog 11T Primary Color Grey RD Spring Type Shadow Speed 11 Mount Standard