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Shimano Zee Chainset 10sp M640

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.
  • Close ratio gear combination: 42-32-24T provides improved cadence while reducing pedal feedback on suspension bikes.
  • 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.
  • Chainrings: 104 / 64 PCD four-arm .
  • For use with: 10-speed HG-X MTB chains only.
  • Average weight: 770 g (175 mm including BB).
  • BB Shell: 68/73mm

A 2 year warranty is offered with all Shimano products from Chain Reaction Cycles (3 years on Dura-Ace and XTR products).

Buy Shimano Zee Chainset 10sp M640 from Chain Reaction Cycles, the World’s Largest Online Bike Store.

  • Colour: Silver
  • Option: With BB, Without BB
  • BoltCircle: 104mm
  • Teeth: 42.32.24t
  • Speed: 10 Speed
  • Length: 180mm, 175mm, 165mm, 170mm
  • Material: Alloy