JJBP Front Centerlock Boost Disc Rotor Spacer for mounting a 15x100 or 12x100 hub in a Boost 110 mm-spaced fork. Pair with the appropriate size 12 or 15 mm ID hub spacers for a full kit. Note that this spacer requires 6-bolt rotors to be used. Requires external-style lockring tool for installation. See video for more details.
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