# How Do Bicycle Gears Work Physics

**You just need enough of a range.**

**How do bicycle gears work physics**.
A large torque is required initially because the bicycle starts from rest.
Even riderless bicycles are stable if given enough forward velocity.
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.
Bikes have two sets of different sized gears on the wheel you pedal and the back wheel.

There is also a gear on the wheel that is 7 cm diameter. Think of it like this. 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. As the bicycle rolls faster the tangential speed of the chain increases eventually becoming too fast for the cyclist to maintain by pushing the pedals.

The axle turns only a short distance but the leverage of the wheel means the outer rim turns much further in the same time. Now on my bicycle there is a gear attached the pedal that is 19 cm diameter to chain center. If a smaller gear is driven by a larger gear the larger gear will rotate quickly but will have a smaller moment. 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.

Like a car wheel a bicycle wheel is a speed multiplier. A gear with a radius of 0 1 m. You can t know the gear range of a bike by the number of gears it has. That s how a wheel helps you go faster.

Essentially gear ratios in a bicycle will change how far the rear wheel will turn for every turn of the pedals. Bicycle physics stability bicycles are inherently stable when riding. The pedals and gears turn the axle at the center. How bicycle wheels work.

For example a high gear on a bike or car. There s no use in buying. Bicycles use gear ratios to change how the force put into the bike is used to make the bike go fast. 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.