# How Do Bike Gears Work Physics

### You can t know the gear range of a bike by the number of gears it has.

How do bike gears work physics. Essentially gear ratios in a bicycle will change how far the rear wheel will turn for every turn of the pedals. Play around with the gears. The axle turns only a short distance but the leverage of the wheel means the outer rim turns much further in the same time. Bicycle gearing physics velocity gear ratios torque and force explained.

Bicycle physics stability bicycles are inherently stable when riding. A gear with a radius of 0 1 m. Instead of touching directly and rotating in opposite directions each pair of gear wheels is connected by a flexible metal chain kept taught by a springy lever and gear shifting mechanism called a derailleur so they turn in the same. It s true that a bike with more gears often has a wider range than one with fewer gears but not always and even if it does you don t necessarily need the widest gear range possible.

Bicycles use gear ratios to change how the force put into the bike is used to make the bike go fast. How bicycle wheels work. On this page i will explain some of the main aspects of the physics of bicycles which should give the reader a greater appreciation of how bicycles work from a physics perspective. There s no use in buying.

Think of it like this. A bike with 30 or more gears is not an indication of a machine designed to break the land speed record any more than a bike with only a single gear assuming similar ratios. You just need enough of a range. Now on my bicycle there is a gear attached the pedal that is 19 cm.

Bikes have two sets of different sized gears on the wheel you pedal and the back wheel. Like a car wheel a bicycle wheel is a speed multiplier. Consult your bike shop at the time of purchase on how yours work or simply jump on your bike make sure to pedal and push your shifters to get a sense of how they function. If a smaller gear is driven by a larger gear the larger gear will rotate quickly but will have a smaller moment.

Even riderless bicycles are stable if given enough forward velocity. To start off lets go over how gear ratios work. Gear ratios that s the basic idea behind applying force to a bicycle or any object really but there s a bit more to it than that.

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