text: how do you use the dials/knobs on a multi-speed bike? i just got myself this multi-speed bike at a thrift store yesterday and i don't know anything about multi-speed bikes.  i don't even know how many speeds it has.  i only know how to ride 1-speed bikes.  can anybody tell me anything about this? bike gears or speeds allow you to pedal more efficienttly.   the number of speeds your new bike has is the result of your front gears multiplied by the rear one. newer mtb bikes will range from 21 to 27 (3 on front and 7,8 or 9 on the rear cog) while road bikes will range from 14 - 18 (2 on front 7,8 or 9 on the rear cog)  the front gears are controled by your left hand shifter (dial/knob) the smaller ring is easier for the hills, while the big ring is better for building speed or going downhill.  the rear gears are controlled by your right hand and they work the opposite as the ones on front, the bigger cog will be easier going uphill and the smaller cog will be harder.  most of the time you can ride on the middle ring, while shifting only the rear cogs. as you get the hang of it, start shifting the front rings.  i leave some links that are more technical and will help you enjoy your new bike