This is the new Shimano SLX M670 2013 10 Speed Hollowtech II Chainset – 42/32/24T is part of the XTR-XT-SLX design cascade. It is a mountain bike chainset. Hollowtech II high provides the combination of rigidity and weight reduction. Shimano's latest and most advanced Hollowtech technology integrates the bottom bracket axle with right crank arm, for more rigidly and weight reduction. External bearings provide more pedal transfer and stability. Easy climbing thanks to 24T lower chain ring ensures plenty of climbing gear options for 29er bikes.
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