Rim: 700C aluminum alloy double rim 30MM, 24 holes, nozzle, sandblasted anodic black. Base: 8-12 speed 7075 aluminum alloy HG/XD/MS six-claw freehub (three teeth per claw). HG installation (8-11 speed installation needs to add a gasket, 12-speed flywheel directly installed), 7-speed cassette flywheel needs to add 3 gaskets.
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