queen bike 50mm carbon fiber track wheel matte finish 3k fixed gear wheelset with cog queen bike rim finish: 3k matte <br> rim width: 23mm <br> rim depth :50mm <br> drill:front 20 rear 24 holes <br> design:12-layer carbon on brake track with braking line <br> hub:novatec 165-166 black track hub <br> cassette body: single speed <br> cog:17 teeths <br> spoke: cn494 (black) <br> nipple:cn alloy external nipple (black) <br> axle:bolt type front m9*100 rear m10*120mm <br> brake pads:2pairs <br> max recommend rider weight:120kg <br> max recommend tyre pressure:125psi <br> weight of wheelset:1880+/-20g±30g/pair (including cog)