Specification:

• Brand new and unused. OEM package.
  
• Crank Construction: HollowTech crank arm
  
• Cassette compatibility: 9
  
• Crank size: 40/30/22t
  
• Crank arm length: 170mm (If you want 175mm, please contact customer service. Thanks.)
  
• BB Shell Width: 68 and 73mm
  

Package includes:

• Option FC-M4050 with BB52: Crank x1; BB52 x1.
  
• Option FC-M4050 no BB52: Crank x1.