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plus 18% less midline pressure vs
Campagnolo Potenza
520-percent gear range giving riders more ability to spin and recover on the burliest climbs
The “650B” is the wheel size
BR-RS405-R
Shimano Ultegra CS-R8000 Cassette 11-Speed 650 plus 18% less midline pressureThis Shimano Ultegra R8000 11 Speed Cassette is tuned to maintain your rhythm with a consistent cadence. Ride anywhere with smooth and precise gear changes as this 11 speed cassette offers improved driving efficiency and stable shifting. Shave bike weight off without sacrificing durability or reliability. The all new ULTEGRA R8000 series is "pro proven" as it is a direct trickle down from DURA ACE groupset. You'll be able to ride harder with superior
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