Description
SLX Hollowtech II Cranksets feature hollow forged crank arms, durable pipe billet steel axles, and smooth shifting SG-X chainrings. Model FC-M660 features traditional MTB triple chainrings, while model FC-M665 features the new Mountain Compact Drive gearing (36-22) along with an integrated bash guard.
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Pros: Lightweight
Stiff
Solid
Cons: Noise
Recommendation: These cranks are lightweight and very stiff. Hold up to the inevitable rock strike. Only complaint is the noise it make when the get hit by trail debris.