Bike gear shifters are used to move the front and rear derailleurs up and down the chainrings or cassette. We offer a choice of trigger shifters or twist grip shifters for your mountain bike. They are both very practical and easy systems to change you gears with out you having to take your hands off the bars. From 7 to 10 speed shifters, including Shimano and SRAM. You should find the ones you are looking for at great prices!