Shimano 105 FC-RS520 Double 12-Speed Chainset

 Specification:

• Lightweight 12-speed 2-piece design chainset
• Innovative forged and anodised aluminium crank arms for minimum flex
• The chainring teeth have been developed to work in conjunction with Hyperglide&plus 12-speed chains for increased contact to provide greater efficiency and improved power transfer
• 2-piece design bottom bracket bearings to be spaced wider apart, enabling the use of larger bearings and an increased axle diameter
• Can be used with Shimano external or press-fit bottom brackets
• The system allows for easier installation, adjustment, and maintenance
• Lightweight anodised aluminium chainrings for smooth and precise shifting

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