gear inch to mph formula

If I remember correctly, gear inches times cadence divided by 336 equals
mph. Try Sheldon Brown though, I have been wrong in the past.
Skip

johnson.. said:

Hi All
Looking for this formula:

chainring /
cog x
wheel size x
pi /
88 /
something x
cadence =
miles per hour

the rest i forget but it gives the speed based on cadence in mph. Anyone
know the rest or something other formula that does the job? Thanks a bunch.

Email me if you want an Excel spreadsheet that calculate gear inches,
development (in meters) and mph for a given crank rpm for triple crank,
da Vinci quad, SRAM DualDrive, Schlumpf Speed and Mountain drives,
Rohloff hubs, jack-shaft step-up gear, and Rotator type mid-drive systems.

--
Tom Sherman – Quad City Area

Hi Tom
Thanks for the offer but avast virus scanner will not allow any
attachments to be opened on this computer.

--
Radio Frequency IDentity tags. The end of privacy.
http://www.securityfocus.com/columnists/169
http://www.nocards.com/welcome/index.shtml
http://www.stoprfid.org/
"Tom Sherman" <[email hidden]> wrote in message
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Quoted message said:

johnson.. said:

Hi All
Looking for this formula:

chainring /
cog x
wheel size x
pi /
88 /
something x
cadence =
miles per hour

the rest i forget but it gives the speed based on cadence in mph. Anyone
know the rest or something other formula that does the job? Thanks a

bunch.

Quoted message said:

Email me if you want an Excel spreadsheet that calculate gear inches,
development (in meters) and mph for a given crank rpm for triple crank,
da Vinci quad, SRAM DualDrive, Schlumpf Speed and Mountain drives,
Rohloff hubs, jack-shaft step-up gear, and Rotator type mid-drive systems.

--
Tom Sherman – Quad City Area

Hi Yous
I just used your formula, looks about right. Thanks

"frank & alma" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

If I remember correctly, gear inches times cadence divided by 336 equals
mph. Try Sheldon Brown though, I have been wrong in the past.
Skip

If you know gear inches, then at 100 rpm multiply GI by .3 to give
approximate speed ie 80 inches = 24 mph.
"johnson.." <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Hi All
Looking for this formula:

chainring /
cog x
wheel size x
pi /
88 /
something x
cadence =
miles per hour

the rest i forget but it gives the speed based on cadence in mph. Anyone
know the rest or something other formula that does the job? Thanks a

bunch.

Quoted message said: