What is a 21 Speed Cycle?

A 21-speed cycle is a type of bicycle equipped with a gear system that includes three front chainrings (connected to the pedals) and seven rear sprockets (on the rear wheel). The combination of these chainrings and sprockets provides a total of 21 possible gear combinations, allowing the rider to adjust the level of resistance and pedal effort.

What is the purpose?

Wide Range of Gears: With 21 different gears, this type of bicycle can handle a variety of terrains, from steep hills to flat roads. The multiple gear combinations make it easier to find the optimal pedaling efficiency for any given terrain.

Climbing Efficiency: Lower gears (small chainring in the front, larger sprockets in the back) make it easier to climb steep hills by providing more torque with less effort.

Speed on Flats and Downhills: Higher gears (large chainring in the front, smaller sprockets in the back) enable higher speeds on flat surfaces and downhill rides.

Adjustable Resistance: Riders can easily switch gears to maintain a comfortable pedaling rate, reducing strain and muscle fatigue over long distances or varied terrains.

Smooth Transitions: The ability to fine-tune the level of resistance allows for smoother transitions between different riding conditions, enhancing overall comfort.

Performance Enhancement: The variety of gears helps in maintaining a steady speed and cadence, which is particularly beneficial for long rides and performance cycling.

How do I shift gears on a 21-speed bike?

Use the left shifter to change the front chainrings (for big changes in resistance) and the right shifter to change the rear cogs (for fine-tuning your resistance). Shift to a lower gear (smaller chainring, larger cog) for climbing and a higher gear (larger chainring, smaller cog) for descending or speeding up.

How often should I service the gears?

It's advisable to inspect and maintain your bike's gears every few months, or more frequently if you ride regularly or in tough conditions. Routine cleaning and lubrication can help prolong the lifespan of your drivetrain.
 

What should I do if the gears are not shifting smoothly?

If your gears aren't shifting smoothly, check for dirt or debris in the drivetrain, ensure the cables are not frayed or stretched, and adjust the derailleur settings. If issues persist, a professional tune-up may be needed.

Is a 21-speed bike good for beginners?

Yes, a 21-speed bike is versatile and provides a range of gears that can help beginners tackle various terrains while developing their cycling skills.

Can I upgrade my 21-speed bike to more or fewer speeds?

Yes, upgrading your bike’s drivetrain is possible, but it might require replacing several components, including shifters, derailleurs, chain, and cassette. Consult with a bike shop to understand the compatibility and cost.