Chris King Devolution headset 1.5'-1 1/8' GripLock

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  • Chris King Devolution headset

    Devolution baseplates allow you to use Chris King headsets designed for larger diameter steerer tubes on forks with smaller diameter steerer tubes.

    • Upper bearing shell: 1 1/4"
    • Lower bearing shell: 1 1/4"
    • Fork Steerer: 1 1/8"


    EC - External: This is the traditional type of thread-less Headset which has upper and lower bearing races pressed into the frame, with the bearings positioned outside of the head tube. These can typically be found on bikes with 1 1/8” head tubes.

    IS - Integrated: A type of headset used on frames where the head tube is machined so that the top and bottom bearings can fit directly inside the frame, eliminating the need for extra bearing cups and enabling the bearings to sit flush with the frame.

    ZS - Internal: A type of headset for bikes without machined head tubes and require aluminum cups to be pressed into the top and bottom of the tube so that the bearings can sit into them. (Zero Stack)
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