TheShimanoDura-Ace CompactChainset-HollowTechIIoffers the optimum balance of light weight and rigidity, making it the global choice for elite riders. ShimanoDura-Ace CompactChainset-HollowTechII Features TheHollowTechII 11-speed Dura-Acechainsetoffers the optimum balance of light weight and rigidity, making it the global choice for road racing's elite riders Hollow outerchainring, giving vast improvements in rigidity and increased weight savings The hollow outerchainringhas essentially removed outerchainringflex, hugely improving shift performance making it precise even under high load These industry leadingHollowTechII 4 arm cold forged hollow crank arms have been evolved to increase...
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