Bicycle Rear
How do the front and rear deraillers work on a bicycle for shifting?
Does one slow you down and one speed you faster?
I guess I am asking why is there a shifter on the left and why one on the right? Is it for right handed or left handed people?
May I suggest that you visit your local bicycle shop and sign up for a basic bicycling class? You sound like a new rider. As basically as I can, I’ll try to answer your question. The shifter on the right works for the back gears. The shifter on the left works for the front gears. There is a most efficient pedal rotation speed suited to you (it’s different for everyone). The combination of front and rear gears allow you to maintain basically the same pedal rotational speed regardless of the terrain (within certain limits). The smaller the front gear you use, the easier it is to pedal (especially uphill) and the faster your pedals will go around. The smaller the rear gear you use, the slower the pedals will go around. You will find that for uphills, flat roads, and downhills you will find generally three gear combinations that you prefer based on your riding style. Trial and error is the best teacher. Change the front and rear gears until your pedal speed and effort feel right for the type of terrain you are on.
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