The low profile xx front derailleur was designed from scratch specifically for 2x10 its a critical part of the xx shifting experience the fastest front shift ever offered in a wide variety of clamp mount and direct mount options speeds 2x10 material forged al 6061 t6 weight 118g low mount outer cage steel compatibility 318mm clamp size 349mm clamp size 381mm clamp size inner cage steel mount options low high direct max tooth 15 tooth bolts torx t25