Understand bike gearing - intelligent overview for beginners

slowlanejane

Well, being a newbie I dont fully properly understand bike gearing and was a bit coy about confessing that on this forum in order to ask for advice. I read the input on other threads and think "Wha...?" So instead I've been trawling the web and found this on YouTube, seems an intelligent overview (but then it might be cr*p because I'm a newbie and am not much of a judge).

So for the benefit of other newbies similarly confused & shy, here's what I found:

http://www.youtube.com/watch?v=1AeNLTQvFN4

I hope its not cr*p because it made sense to me.

hopper1

I can't view 'you tube', so can't comment!

Ben6899

You could also draw up a gear-inch spreadsheet based on the following formula:

Gear inches = (chain ring teeth/cassette cog teeth) x wheel diameter

So if I'm in the big ring and smallest cog of my cassette:
Gear inches = (50/11) x 27 = 123, which is a 'hard' number of inches to pedal.

Or the opposite combination:
Gear inches = (34/25) x 27 = 37, which is an 'easy' number of inches to pedal.

I'm running a compact by the way...

Ben

markos1963

Ben6899 wrote:

You could also draw up a gear-inch spreadsheet based on the following formula:

Gear inches = (chain ring teeth/cassette cog teeth) x wheel diameter

So if I'm in the big ring and smallest cog of my cassette:
Gear inches = (50/11) x 27 = 123, which is a 'hard' number of inches to pedal.

Or the opposite combination:
Gear inches = (34/25) x 27 = 37

This would be an 'easy' number of inches to pedal.

I'm running a compact by the way...

Ben

Try this instead, much easier.

http://software.bareknucklebrigade.com/ ... pplet.html

Ben6899

markos1963 wrote:

Ben6899 wrote:

You could also draw up a gear-inch spreadsheet based on the following formula:

Gear inches = (chain ring teeth/cassette cog teeth) x wheel diameter

So if I'm in the big ring and smallest cog of my cassette:
Gear inches = (50/11) x 27 = 123, which is a 'hard' number of inches to pedal.

Or the opposite combination:
Gear inches = (34/25) x 27 = 37

This would be an 'easy' number of inches to pedal.

I'm running a compact by the way...

Ben

Try this instead, much easier.

http://software.bareknucklebrigade.com/ ... pplet.html

Aye that's a nice little application, but it's always good to see where the numbers come from.

Ben

John C.

Gearing is simple, if in doubt get a tripple.

markos1963

John C. wrote:

Gearing is simple, if in doubt get a tripple.

Triple!!

John C.

markos1963 wrote:

John C. wrote:

Gearing is simple, if in doubt get a tripple.

Triple!!

my wrists are slapped

markos1963

Mnid you my spleenig is jsut as bad

a_n_t

markos1963 wrote:

John C. wrote:

Gearing is simple, if in doubt get a tripple.

Triple!!

Tipple!

markos1963

a_n_t wrote:

markos1963 wrote:

John C. wrote:

Gearing is simple, if in doubt get a tripple.

Triple!!

Tipple!

I'll have a double then!