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 Track Cycling: Velodrome Racing and Training Area Looking to enter into the realm of track racing? Want to share your experiences and tactics for riding on a velodrome? The Track Cycling forums is for you! Come in and discuss training/racing, equipment, and current track cycling events.

 02-28-06, 02:49 PM #1 eat_raw Senior Member Thread Starter   Join Date: Apr 2005 Bikes: Posts: 177 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) Cadence Formula 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)
 02-28-06, 04:10 PM #2 WarrenG Oldbie bike racer   Join Date: Jan 2006 Location: NorCal Bikes: Steve Rex road, track, Richard Sachs road, Giant mtb Posts: 196 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) At www. analyticcycling.com you can find this answer, and many other answers to questions like this.
 02-28-06, 06:02 PM #3 neilG Senior Member     Join Date: May 2005 Location: Ventura, CA Bikes: Madone, De Rosa, Langster, some old Brit track iron Posts: 444 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) 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?
02-28-06, 08:28 PM   #4
WarrenG
Oldbie bike racer

Join Date: Jan 2006
Location: NorCal
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Quote:
 Originally Posted by neilG 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!

 03-12-06, 04:22 PM #5 fordfasterr One speed: FAST !     Join Date: Dec 2005 Location: Ft. Lauderdale FL Bikes: Ebay Bikes... =) Posts: 3,375 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) 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/
 03-26-06, 09:34 AM #6 abm1213 ...     Join Date: Jul 2004 Bikes: Posts: 47 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) http://www.fixedgearfever.com/module...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).