Shimano 7900 Dura-Ace double chainset -

The HollowTech II 10-speed Dura-Ace chainset offers the optimum balance of light weight and rigidity

The HollowTech II 10-speed Dura-Ace chainset offers the optimum balance of light weight and rigidity making it the global choice for road racings elite ridersShimano has raised the bar to a new level of performance with the development of a hollow outer chainring giving vast improvements in rigidity and increased weight savingsThe hollow outer chainring has essentially removed outer chainring flex hugely improving shift performance making it precise even under high loadThese industry leadi

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