Understanding High Gears on Bikes

  • Context: High School 
  • Thread starter Thread starter dEdt
  • Start date Start date
  • Tags Tags
    Gears
Click For Summary
SUMMARY

Bikes utilize higher gears to optimize pedaling efficiency at varying speeds. In a higher gear, riders can maintain a comfortable pedaling rate while achieving higher speeds, as the gear ratio allows for greater torque application. This configuration enables cyclists to deliver power effectively, balancing speed and force, particularly beneficial when transitioning from uphill to downhill terrains. Understanding this mechanism is crucial for maximizing cycling performance.

PREREQUISITES
  • Basic understanding of bicycle mechanics
  • Familiarity with gear ratios and torque
  • Knowledge of power output calculations in cycling
  • Experience with different cycling terrains and their impact on gear selection
NEXT STEPS
  • Research the mechanics of bicycle gear ratios
  • Learn about torque and its role in cycling performance
  • Explore the physics of power output in relation to speed and force
  • Investigate optimal gear selection strategies for various terrains
USEFUL FOR

Cyclists, bike mechanics, and fitness enthusiasts looking to enhance their understanding of gear systems and improve cycling efficiency.

dEdt
Messages
286
Reaction score
2
Why do bikes have higher gears? At a higher gear, I'm still pedaling with the same force, but at a lower speed, so my power output is lower. What's the advantage of higher gears?
 
Physics news on Phys.org
In a higher gear, you would be pedaling with more force (more torque). The advantage of a higher gear is it keeps the rate of rotation near what is optimal for a rider at higher speeds. Wiki article:

http://en.wikipedia.org/wiki/Bicycle_gearing
 
Gears allow you to go at a range of wheel speeds whilst your legs are going at the same (comfortable) rate. You can only deliver power at a given maximum rate. Power is speed times force. So you can deliver, to the wheels, a high force at low speed (uphill) and a smaller force at high speed (going downhill) whilst your legs are working at the same rate.
 

Similar threads

Replies
5
Views
2K
  • · Replies 13 ·
Replies
13
Views
2K
  • · Replies 16 ·
Replies
16
Views
4K
  • · Replies 13 ·
Replies
13
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 0 ·
Replies
0
Views
770
  • · Replies 10 ·
Replies
10
Views
2K
  • · Replies 17 ·
Replies
17
Views
925
Replies
2
Views
3K
Replies
1
Views
2K