Fits some Gary Fisher and Trek Compatibility: Gary Fisher: Ion Series - 2010 / Mendota - 2010 / Monona - 2010 / Road Crown Series - 2010 / Wingra - 2010 Trek: 4 Series - 2010-2014 / 4300 Disc - 2012 / 4500 Disc - 2012 / 6000 - 2012 / 6000 WSD - 2012 / 7.2 FX - 2012-2014 / 7.2 FX WSD - 2012-2014 / 7.3 FX - 2012-2014 / 7.3 FX Disc - 2012-2014 / 7.3 FX Disc WSD - 2012-2014 / 7.3 FX WSD - 2012-2014 / 7.4 FX - 2012-2014 / 7.4 FX WSD - 2012-2013 / 7.5 FX S-138