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Shimano 7900 dura ace double chainset hollowtech ii 180 mm 53 39t
shimano 7900 dura ace double chainset hollowtech ii 180 mm 53 39t
Shimano 7900 dura ace double chainset hollowtech ii 180 mm 53 39t
The hollowtech ii 10 speed dura ace chainset offers the optimum balance of light weight and rigidity44 making it the global choice for road racing39s elite ridersshimano has raised the bar to a new level of performance with the development of a hollow outer chainring44 giving vast improvements in rigidity and increased weight savingsthe hollow outer chainring has essentially removed outer chainring flex44 hugely improving shift performance making it precise even under high loadthese

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