Shimano XTR Dyna-Sys FC-M980 HollowTech II Double Chainset

Class-leading XTR 10-speed Dyna-Sys chainset, integrating the bottom bracket and chainset into a strong, rigid, yet lightweight unit

• Integrated design makes installation and adjustments easier than ever
• Precision bottom bracket bearings are spaced further apart, and are therefore more stable and longer lasting than conventional bottom brackets
• Super-lightweight HollowTech II forged Duralumin crank arms – hollow design saves weight whilst increasing rigidity
• Easy to use splined bottom bracket spindle connection provides a rigid and secure interface between crank and spindle
• The middle HG-X chainring is made of titanium supported in a carbon shell which combine to produce a hard-wearing, light weight, and stiff set up
• Stiff, light weight and hard-wearing HG-X 7075 aluminium outer and inner chainrings with a highly durable Nickel-plate treatment
• HG-X chainring with patented spike pins give smooth and fast gear shifts under load
• 104 / 64 PCD four-arm chainrings
• For use with 10-speed HG-X MTB chains only