Sprockets - Tech Tip - Determing Final Gear Ratio
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Seasoned HDF Member
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From: Santa Klaus County, Cali
Sprockets - Tech Tip - Determing Final Gear Ratio
Since there are a couple of threads started about sprockets thought I would throw some information to any who might be interested.
First and foremost the original information is not my doing. It came from the Custom Chopper Cookbook, written by Mike Geokan and edited by Mike Arman circa 1981 and 1988. So if they are any old-skoolers who know either of the gents tell them that the information is still being shared and that there are those that still keep the information at the ready.
What I have done is include the original information on sprocket gearing (37/51) that was put in the original book and added another section that includes 37/48).
If it helps .... cool. Did not want to hijack either of the threads going on about sprockets so thought it best to start a separate one.
And if for some reason the pics are too small I can email them to anyone interested. Created them in a word doc and saved them as a pdf file.
First and foremost the original information is not my doing. It came from the Custom Chopper Cookbook, written by Mike Geokan and edited by Mike Arman circa 1981 and 1988. So if they are any old-skoolers who know either of the gents tell them that the information is still being shared and that there are those that still keep the information at the ready.
What I have done is include the original information on sprocket gearing (37/51) that was put in the original book and added another section that includes 37/48).
If it helps .... cool. Did not want to hijack either of the threads going on about sprockets so thought it best to start a separate one.
And if for some reason the pics are too small I can email them to anyone interested. Created them in a word doc and saved them as a pdf file.
Last edited by panz4ever; Apr 9, 2012 at 08:38 PM.
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Joined: Mar 2009
Posts: 66,137
Likes: 51,477
From: Niles Canyon Ca.
Try this place , does the same thing without all the fraction math for you . Just fill in the numbers . Nice to play with .
http://www.nightrider.com/biketech/calc_gearratios.htm
http://www.nightrider.com/biketech/calc_gearratios.htm
Thread Starter
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Seasoned HDF Member
Joined: Oct 2005
Posts: 7,503
Likes: 3,729
From: Santa Klaus County, Cali
Try this place , does the same thing without all the fraction math for you . Just fill in the numbers . Nice to play with .
http://www.nightrider.com/biketech/calc_gearratios.htm
http://www.nightrider.com/biketech/calc_gearratios.htm
Club Member
Joined: Mar 2009
Posts: 66,137
Likes: 51,477
From: Niles Canyon Ca.
Hell man even I don't do the math anymore I look at good tech info sights like that just like my tool boxes and you've seen them .
Thread Starter
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Seasoned HDF Member
Joined: Oct 2005
Posts: 7,503
Likes: 3,729
From: Santa Klaus County, Cali
Guess I should have thought about tech info sites (but it never even occurred to me that such would be available...shows how prehistoric I am I suppose).
My wife is always busting my chops (in a friendly way) about getting me into the modern age. I still use a pocket slide rule when I am in the garage for calculations, just cannot seem to get into the calculators with batteries or sun-powered energy.
Have to say though that the web page you referred to was quick and easy.
Guess my first thought is to use the resources (books, manuals, and such) that I have accumulated over the years rather than going to the internet. Not because the internet is a bad thing...it is just that it is not my first response when trying to solve a problem with the bikes or my truck.
Thanks for adding the information tip.
My wife is always busting my chops (in a friendly way) about getting me into the modern age. I still use a pocket slide rule when I am in the garage for calculations, just cannot seem to get into the calculators with batteries or sun-powered energy.
Have to say though that the web page you referred to was quick and easy.
Guess my first thought is to use the resources (books, manuals, and such) that I have accumulated over the years rather than going to the internet. Not because the internet is a bad thing...it is just that it is not my first response when trying to solve a problem with the bikes or my truck.
Thanks for adding the information tip.
Last edited by panz4ever; Apr 10, 2012 at 12:54 AM.
Club Member
Joined: Mar 2009
Posts: 66,137
Likes: 51,477
From: Niles Canyon Ca.
Guess I should have thought about tech info sites (but it never even occurred to me that such would be available...shows how prehistoric I am I suppose).
My wife is always busting my chops (in a friendly way) about getting me into the modern age. I still use a pocket slide rule when I am in the garage for calculations, just cannot seem to get into the calculators with batteries or sun-powered energy.
Have to say though that the web page you referred to was quick and easy.
Guess my first thought is to use the resources (books, manuals, and such) that I have accumulated over the years rather than going to the internet. Not because the internet is a bad thing...it is just that it is not my first response when trying to solve a problem with the bikes or my truck.
Thanks for adding the information tip.
My wife is always busting my chops (in a friendly way) about getting me into the modern age. I still use a pocket slide rule when I am in the garage for calculations, just cannot seem to get into the calculators with batteries or sun-powered energy.
Have to say though that the web page you referred to was quick and easy.
Guess my first thought is to use the resources (books, manuals, and such) that I have accumulated over the years rather than going to the internet. Not because the internet is a bad thing...it is just that it is not my first response when trying to solve a problem with the bikes or my truck.
Thanks for adding the information tip.
I'd love to have your library believe me , I like the tech sites for the show and tell aspects when I'm working with somebody who hasn't a clue and that particular site is a good one . Simplified a number of my headaches with the ones who just didn't seem to be able to grasp what I'm telling them , plop them down at the keyboard and go to school .
Your showing off bud
I can't squint enough to read a slide rule anymore 
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