How Bicycle Wheel Rim weight changes forward acceleration?

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SUMMARY

The discussion focuses on the impact of lighter bicycle wheel rims on forward acceleration, emphasizing that reducing rim weight enhances acceleration similarly to reducing frame weight. Specifically, a total decrease of 0.5 kg in rim weight equates to the effect of reducing the frame weight by nearly 1.0 kg. The conversation also highlights the importance of maintaining rim strength, particularly in BMX applications, where excessively light rims may bend upon landing jumps. The calculations rely on principles of moment of inertia, which dictate how weight distribution affects acceleration.

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  • Understanding of moment of inertia in physics
  • Basic knowledge of bicycle mechanics and components
  • Familiarity with BMX riding dynamics
  • Awareness of weight distribution effects on performance
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  • Explore the relationship between wheel weight and acceleration in bicycles
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Cyclists, bicycle engineers, BMX riders, and anyone interested in optimizing bicycle performance through component weight reduction.

Sprogpole
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How much faster will a bicycle accelerate forward if both front and rear wheel rims are changed for lighter ones?
Power input, size, hubs, spokes tyres, Frame etc all staying the same.
I can give you any sizes and weights needed, let me know what is needed for this calculation and I’ll reply.
Thanks for your time
 
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The affect on acceleration of a difference in weight in the rims would be similar to a bit less than doubling that same difference in weight on the frame. If each rim is 0.25 kg lighter, for a total decrease in rim weight of 0.5 kg, then the affect would be similar to the frame being a bit less than 1.0 kg lighter.
 

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