Diameter: 20 mm
Color: Red/ Black/ Silver/ Gold/ Blue
Material: Aluminium alloy 6061
Name: Bicycle Crank Arm Fixing Bolt
Tooth disk device classification: Tooth disc
Package Includes:1 x Bicycle Crank Arm Fixing Bolt
Weight: 9g
Note: The diameter of the tooth disc screw is 20mm, so it can not fit for the 18mm diameter bicycle, like FC-4500, FC-5600. It is fit for or some same specification bicycles.