Track Cycling: Velodrome Racing and Training Area - Cadence Formula
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eat_raw
02-28-06, 02:49 PM
Given
gearing (48 x 16)
wheelsize (700 x 23c)
and
speed (say 20 mph)
what's the formula to calculate cadence? (assuming it can be derived this way)
WarrenG
02-28-06, 04:10 PM
At www. analyticcycling.com you can find this answer, and many other answers to questions like this.
This should be good for a laugh. This is how a math-impaired musician approaches it:
48x16= 81 inch gear (assume 27" wheel), x pi = 21.195 ft. developed gear.
21.195 feet is .0040142 miles
20 miles divided by .0040142 miles = 4982.3 pedal revolutions, divided by 60 minutes = 83 RPM
Howd I do?
WarrenG
02-28-06, 08:28 PM
This should be good for a laugh. This is how a math-impaired musician approaches it:
48x16= 81 inch gear (assume 27" wheel), x pi = 21.195 ft. developed gear.
21.195 feet is .0040142 miles
20 miles divided by .0040142 miles = 4982.3 pedal revolutions, divided by 60 minutes = 83 RPM
Howd I do?
We have a winner! analyticcycling.com says 84 rpm.
Vanna, tell Neil what he's won!
fordfasterr
03-12-06, 04:22 PM
I made this one a while back.. if you view the page source, you can try to make sense of my program.
=)
http://fixedgeargallery.com/articles/steve-cadence/
abm1213
03-26-06, 09:34 AM
http://www.fixedgearfever.com/modules.php?name=Downloads
There is a spreadsheet called: GearSpeedAdvancedWorksheet.xls
Whoever put it together covered all the bases. If you want to see the formulas rather than the results, you do the following keystroke combo: CNTL + ` (that last character is the farthest left most upper key on a standard PC keyboard).