# Road Cycling - calculating cadence

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auricpoe
03-27-04, 09:43 PM
How do I calculate my cadence mathmatically......i need to improve it

a little help

Jakey
03-27-04, 09:54 PM
How do I calculate my cadence mathmatically......i need to improve it

a little help

http://www.performancebike.com/shop/large_photo.cfm?SKU=16439&Store=Bike ;)

auricpoe
03-27-04, 10:01 PM
I have a computer and dont have money....wondering how to do it with a pencil and paper and maybe a calculator

djbowen1
03-27-04, 10:40 PM
Count pedal strokes for 15 seconds and multiply by four.

TriDevil
03-27-04, 10:41 PM
Simply count the number of complete revolutions you do in 10 seconds and multiply by 6. Once you know what cadence you want you start to remember how many revs in 10 seconds you should do. I spin so I know I normally need to do 18-20 revs in 10 seconds. There is no complex math to work out.

auricpoe
03-27-04, 11:24 PM
sounds good...better than i thought.....thanks

oxologic
03-27-04, 11:29 PM
Why don't go by the way "if it feels fast, it is fast"?? Lol, anyway, calculation is simple. If you need it very accurately, you will do it by counting the total revolutions in a minute. You can also count for 10s, multiply by 6 and get a +/- 6 error. Count by 15s, multiply by 4 and get a +/- 4 error. So it is up to you and good luck spinning.

Don Cook
03-30-04, 08:56 AM
auricpoe, here's the math for it.

Where:
SPD = speed in miles per hour
WC = Wheel circumference in feet (decimal precision is your choice)
GR = Gear Ratio (teeth on front chain ring divided by the teeth on rear cog)

(((SPD/60)*5280)/WC)/GR

This equation was derived from my gear ratio-cadence-speed spreadsheet. It will provide you an an accurate result. If you know your gear ratios (if not, calculate them) , and your wheel circumference, then for any given speed and gear combination your cadence wil be known.

Don Cook
03-30-04, 09:41 AM
The Gear Ratio-Speed spreadsheet that was mentioned in the above post has been updated to include automatic cadence calculations. If you are interested shoot me an email with your return email. It's an Excel file created in MSOffice 2000.