MTB Front Derailleurs come in two main types; top swing or conventional this depends on how your frame routes the front gear cable. Front derailleurs also come in double or triple versions depending on whether you have a double or triple chainset and gear levers. The seat tube clamp usually features a multi-fit band ensuring fitment for different size seat tubes. Merlin stock front derailleurs from Shimano, Campagnolo and Sram.