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Shimano Shimano SLX Dyna-Sys Chainset M660-10 Triple Hollowtech II
Shimano SLX Dyna-Sys Chainset M660-10 Triple Hollowtech II
Shimano SLX Dyna-Sys Chainset M660-10 Triple Hollowtech II
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Key Features
Shimano Dyna-Sys
Shimano SLX
Q & A

Whilst the visuals have not changed, the Shimano SLX M660-10 chainset is now designed to use Shimano's new Dyna-Sys 10 speed technology which offers an improved selection of gear ratios for greater flexibility and reduced chain tension. SLX has forged a repulation for being both tough and aggressive yet also reasonably lightweight and above all excellent value, finished in a two tone anodised finish for long lasting good looks it shares many features with the upmarket XT group at a significantly lower cost.

Hailing from Japan, it's no surprise that Shimano are masters of metallurgy, and their hollow forged crank arms offer both lightness and rigidity yet remain incredibly strong and durable at the same time, whilst the HollowTech II axle standard and external bottom bracket cup design enables wide bearing placement with a large axle diameter for levels of stiffness, and longevity that have become the industry standard.
This Triple version uses 42-32-24 tooth SG-X chainrings designed specifically for the new directional Dyna-Sys 10 speed chains and rear cassettes, featuring patented spike pins to deliver astonishingly smooth and fast gear shifts under load. The use of a drilled steel and glassfibre composite middle ring (rather than the alloy version found on XT) gives greater rigidity and strength with reduced wear rates and a significantly lower replacement cost, all at a marginal weight penalty.

Supplied complete with a Hollowtech 2 bottom bracket for suitable for both 68 and 73 mm frames, Tweeks Cycles recommend that the bottom bracket is installed by a qualified mechanic to ensure perfect facing and fit.

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