# Questions tagged [math]

Calculation - questions asking for how to get a number as an answer.

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### How is the suspension frequency response effected by the wheel diameter?

Imagine riding off a curb, crossing a pothole, or hitting a pebble. Would you prefer to ride that with a toy bike or a penny-farthing? Regardless of preference, the penny-farthing would have a ...
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229 views

### Looking to understand the math behind spoke length calculation. Help?

Does anyone here have insight into what I may be doing wrong or explaining incorrectly with this question on math.stackexchange regarding the math behind spoke length calculation? https://math....
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311 views

### How to estimate the speed of cyclist with given parameters

How is the speed of the cyclist determined? If I know the effort of pedaling in watts, the air drag area in meters squared, the rolling resistance details of the tires, and the mass of the cyclist and ...
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5k views

### How do I calculate the spring weight rating for my bike?

I have a home built bike design and the rear shock absorber that came with the part bottoms out so I want to get one that is more appropriate. But I have no idea how to calculate which one to buy as ...
• 475
11k views

### Calculate frame stack and reach

Is is possible to calculate stack and reach for framesize 63?
• 352
11k views

### Formula to calculate Single Speed Chain Length from Chainring Size, Cog Size, and Chainstay Length

I've seen formulas to calculate chain length for multi-speed bikes, but I need something for single speed. Example: 42T Chainring 17T Cog 406mm (16") Chainstay Length The answer in this case should ...
• 143
19k views

### How can i calculate the power in watts on an indoor trainer

I am trying to calculate the power needed to hold a steady speed on an indoor trainer, so as I can train using power in watts. I set the bike up and put the crank at 90 degrees, then put a weight of 2....
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41k views

### How do I calculate the power required to climb a hill at a given cadence?

Suppose I ride at a cadence of 50RPM for 10 minutes with a 39x23 gear ratio on a hill with 10% grade. Is there a simple formula to calculate the power output required?
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195k views

### How to calculate the capacity of a rear derailleur

It's easy to calculate what capacity of a rear derailleur will be needed based on the size of the big and small chainring and the big and small cog. What about the converse question, how to calculate ...
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