
Shimano XTR M970 9 Speed Hollowtech II Triple Chainset: Class-leading XTR chainset, integrating the bottom bracket & chainset into a strong, rigid, yet lightweight unit. Incorporating the benefit of rigidity with minimal weight of the Hollowtech II combined bottom bracket & crankset system, the new FC-M970 manages to drop even more weight while increasing shifting performance & durability. Integrated design makes installation & adjustments easier than ever Precision bottom bracket bearings are spaced further apart, & are therefore more stable & longer lasting than conventional bottom brackets Super-lightweight Hollow Tech II forged Duralumin crank arms
- hollow design saves weight whilst increasing rigidity Silver crank arm face for lasting good looks Easy to use splined Octalink bottom bracket spindle connection provides a rigid & secure interface between crank & spindle The middle chainring is made from titanium supported in a carbon shell which combine to produce a hard-wearing, light weight, & stiff set up Development has resulted in stiffer, light weight & hard-wearing Hyper Drive 7075 aluminium outer & inner chainrings with a highly durable Nickel-plate treatment For use with Super Narrow HG chain