The zipp forged al free hubs are easy to change the conversion kit includes free hub end cap bearing shield and rear hub washers use these conversion kits for the 10 speed 188 road hub with the black or silver clinch nuts note if your hub has woven carbon hub caps you need the 06 182 free hub this free hub will not work as the axel size is too large not compatible with model year 2013 or 11 speed wheels key features zipp 188 freehub 10 speed conversion kit allows you to quic