Cnc machined 6061 aluminium black mounting finish mounting hardware included the wheels manufacturing hanger no110 will fit the following models cannondale bad boy series 2011 caa8 frame series 2011 caad8 fem 6 amp fem 8 2010 caad8 optimo 1 amp 2 2007 caad8 s6 amp s8 2010 caad9 1 amp 4 amp 5 amp 6 2010 caad9 fem5 amp fem6 2010 caad9 optimo 2 2007 caad9 series 2008 caadx 5 amp 6 2012 carbon amp quick fem series 2010 cyclocross 5 2010 di2 hi mod fem 1 201