Sram Zipp Cassette Spacer

FIX YOUR BIKEA Zipp exclusive, the 6XXX aluminum alloy found in our track lock rings is 40 percent harder and 33 percent stronger than industry standard 7075 aluminum. Cut to exacting ISO standards for perfect thread contact, they are standard equipment on Zipp track hubs and discs. But youGCOll want to keep a few spares around for your other track wheels. FEATURESSee Description