Cadence and speed calculation

rustychisel
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Cadence and speed calculation

Postby rustychisel » Tue Oct 05, 2010 10:29 am

Help needed from the mathematically inclined, please.

Fixed gear, 48x18 on 700c wheels, speed attained was 56.7kmh.
Can anyone tell me what cadence that equates to?

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rkelsen
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Re: Cadence and speed calculation

Postby rkelsen » Tue Oct 05, 2010 10:56 am

2.1m (approx. 700c rollout) x 48/18 = 5.6m per 'rev'

56,700 metres/hour = 945 m/minute

945/5.6 = 169 rpm. :shock:

brauluver
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Re: Cadence and speed calculation

Postby brauluver » Tue Oct 05, 2010 11:37 am

rustychisel wrote:Help needed from the mathematically inclined, please.

Fixed gear, 48x18 on 700c wheels, speed attained was 56.7kmh.
Can anyone tell me what cadence that equates to?


I'll post you link when I get home that has it all covered.

rustychisel
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Re: Cadence and speed calculation

Postby rustychisel » Tue Oct 05, 2010 1:10 pm

thanks, hmmm 169rpm seems much higher over sustained effort. Thought I was nearer the 200. :oops:

I was over 55kmh for quite some time, maybe 250m, going down the hill north from the Morialta Falls main gates past the Black Hill Conservation Park, on the fixed, of course, Saturday morning.

brauluver
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Re: Cadence and speed calculation

Postby brauluver » Tue Oct 05, 2010 4:53 pm

plug the permutations into this http://software.bareknucklebrigade.com/

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boyracer
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Re: Cadence and speed calculation

Postby boyracer » Wed Oct 06, 2010 4:38 pm

rustychisel wrote:thanks, hmmm 169rpm seems much higher over sustained effort. Thought I was nearer the 200. :oops:

I was over 55kmh for quite some time, maybe 250m, going down the hill north from the Morialta Falls main gates past the Black Hill Conservation Park, on the fixed, of course, Saturday morning.


so will we be seeing you at friday roller racing then?

rustychisel
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Re: Cadence and speed calculation

Postby rustychisel » Wed Oct 06, 2010 5:05 pm

where? when?

You callin' me out? :wink:

yehuwdiy
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Re: Cadence and speed calculation

Postby yehuwdiy » Wed Oct 06, 2010 8:34 pm

Holy bat cave Rustychisel, I think my knees just blew out reading that! You must have rotary legs to spin at those kinds of speeds :P

##Edited, thanks!
Last edited by yehuwdiy on Wed Oct 06, 2010 9:44 pm, edited 1 time in total.

brauluver
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Re: Cadence and speed calculation

Postby brauluver » Wed Oct 06, 2010 9:38 pm

yehuwdiy wrote:Holy bat cave Rustychisel, I think my knees just blew out reading that! You must have rotary legs to spin at those kinds of speeds :P


Fixed that for ya. :wink:

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boyracer
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Re: Cadence and speed calculation

Postby boyracer » Thu Oct 07, 2010 11:01 am

Edwardstown velodrome clubrooms friday evening. pacc.org.au
I'm pretty keen and think a few tuesday riders will be on it.

rustychisel
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Re: Cadence and speed calculation

Postby rustychisel » Thu Oct 07, 2010 1:32 pm

yehuwdiy wrote:Holy bat cave Rustychisel, I think my knees just blew out reading that! You must have rotary legs to spin at those kinds of speeds :P

##Edited, thanks!


nay, knees blow out at the other end of the spectrum, doing 8kmh and blowing snot trying to work the same gear through the Montacute Road valley.

brauluver
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Re: Cadence and speed calculation

Postby brauluver » Thu Oct 07, 2010 10:23 pm

boyracer wrote:Edwardstown velodrome clubrooms friday evening. pacc.org.au
I'm pretty keen and think a few tuesday riders will be on it.


Pity about the $70 odd buck$ to enter :shock:

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boyracer
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Re: Cadence and speed calculation

Postby boyracer » Fri Oct 08, 2010 1:34 pm

killed it for a lot of us....

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