Shimano Ultegra R8000 172.5mm Left Crank Arm Model-G3/AMg(V1/V2)/Micro/1x(V2/V3) Aluminum Thumb Screw attaches to

Aluminum Thumb Screw attaches to your GoPro style interface bicycle mount providing more adjustment and gripping leverage for your action camera or light

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and steepened the Switchblade’s seat tube to allow for longer travel dropper seat posts

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Shimano Ultegra R8000 172.5mm Left Crank Arm Model-G3/AMg(V1/V2)/Micro/1x(V2/V3) Aluminum Thumb Screw attaches toShimano Ultegra R8000 172. 5mm Left Crank Arm. Shimano Ultegra FC R8000 Left Crank Arms TECH SPECS Color Black Spindle Interface Type Hollowtech II Length 172. 5