Outstanding blend of value and performance from Shimano.
Engineered to the same specifications as Dura-Ace, demanded by aspiring racers, triathletes, fitness riders, long distance cyclists, and anyone who demands real racing performance from a road bike.  Weight(claimed):

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Freewheel for threaded Single Speed/BMX hubs.
Freewheel for threaded Single Speed/BMX hubs. Weight: 171 g(16t), 184 g(18t)

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Reliable, smooth-shifting cassette from SRAM at a great price.
Reliable, smooth-shifting cassette from SRAM at a great price. Fits Shimano and Shimano-compatible 9 speed cassette bodies. This can be used for either a MTB or Road 9-spd drivetrain.  Weight: 164 grams (11-21

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Affordable, Shimano 8 speed compatible SRAM cassettes
SRAM 5.0: Simple, lightweight, efficient, stiff componentry Weight: 295 grams Compatibility: 8 speed

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Ultegra now steps into the 10 speed world with the introduction of the 6600 cassette.
Ultegra now steps into the 10 speed world with the introduction of the 6600 cassette. A wide variety of gearing options let you choose just the right combo for your ride. Shimano-patented ramps and tooth profiles ensure effortless shifting. Compatible

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The 7800 Shimano Dura-Ace group boasts a variety of improvements, and the 10 speed cassette is no exception. Weighing in at just 173 grams (11-23 model), it boasts a new surface treatment that increases durability by approximately 30%.
The new Dura-Ace group boasts a variety of improvements, and the 10 speed cassette is no exception. Weighing in at just 173 grams (11-23 model), it boasts a new surface treatment that increases durability by approximately 30%. Thanks to the judicious use

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Shimano brand cog spacers
Shimano brand cog spacers.

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Enjoy the same reliable, lightweight performance that SRAM’s BlackBox racers enjoy.
Enjoy the same reliable, lightweight performance thatSRAM’s BlackBox racers enjoy. The 990 cassette has been updated with a trickanodized aluminum lockring and spider that shaves grams over previous setups.The cogs are blast chrome plated for a durable, a

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The Powerflow is the best value cassette we carry, bar none.
The Powerflow is the best value cassette we carry, bar none. It’s Shimano compatible spacing means it works perfectly with modern drivetrains from Shimano or SRAM. Chrome finish.

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Shimano lockring spacers
Shimano lockring spacers

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