i dont know about for fixed but for bmx them hubs are shite, i know a large handfull of people who have broken the flanges.
should have had these: http://www.chainreactioncycles.com/Models.aspx?ModelID=64079
@ObiWomKenobi started
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should have had these: http://www.chainreactioncycles.com/Models.aspx?ModelID=64079