Sram x7 2x10sp high clamp front mechwide range 2x10 system with x glide front shifting technology featuresspeeds2x10material forged al 6061 t6weight137 gramsouter cage steelinner cage steelmount options high clamp42t this front derailleur will work with standard 39 26t and 42 28t ratio chainsets to adjust for 39t or 42t outer chainrings the user simply needs to move the derailleur up or down on the seat tube38t this front derailleur will work with smaller 36 22t and 38 24t ratio ch