Flower drum: the first two and the second five palins are easy to detach, and the base can be removed without tools for easy cleaning/maintenance. Aluminum alloy, 32 holes, six nail disc brake mounting hole,12 speed aluminum alloy 3 3 claw base (8-11 speed installation need to add a gasket,12 speed flywheel direct installation), 7 speed card flying need to add 3 gaskets.
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