self extracting crank bolts, you just use the allen key in the middle and as u undo the bolt, the specail adaptor pushes against the face popping the cranks off ie no need for crank puller.
@dogsballs started
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self extracting crank bolts, you just use the allen key in the middle and as u undo the bolt, the specail adaptor pushes against the face popping the cranks off ie no need for crank puller.