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Questions tagged [math]

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

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2 votes
1 answer
149 views

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 ...
tcecrog's user avatar
  • 21
2 votes
2 answers
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....
zenbike's user avatar
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3 votes
1 answer
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 ...
juhist's user avatar
  • 20.6k
3 votes
2 answers
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 ...
Eric Huelin's user avatar
3 votes
2 answers
11k views

Calculate frame stack and reach

Is is possible to calculate stack and reach for framesize 63?
Karsten's user avatar
  • 352
4 votes
1 answer
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 ...
Jason Wood's user avatar
2 votes
2 answers
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....
user5944's user avatar
10 votes
5 answers
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?
Rick Ant's user avatar
  • 919
27 votes
6 answers
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 ...
Darth Egregious's user avatar
17 votes
3 answers
7k views

How do I calculate spoke length?

I have lots of bikes and lots of interesting wheel sizes, I would like to know how to calculate the right spoke lengths for a wheel. I appreciate that there are probably rather a lot of variables but ...
Murph's user avatar
  • 1,257