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Cogs, gears, sprockets...

Old 06-07-17, 04:14 PM
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TimothyH
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Cogs, gears, sprockets...

A cog is a tooth on a sprocket or gear.

A sprocket is a round disk with cogs.

A pulley is a round disk without cogs.

Gears are two sprockets which mesh together. Gears don't use chains.

When gears are separated from each other and connected with a chain they become sprockets.

You don't change gears on a bicycle. You change sprockets.


-Tim-
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Old 06-07-17, 04:29 PM
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Originally Posted by TimothyH View Post
A cog is a tooth on a sprocket OR gear.

A sprocket is a round disk with cogs.

A pulley is a round disk without cogs.

Gears are two sprockets which mesh together. Gears don't use chains.

When gears are separated from each other and connected with a chain they become sprockets.

You don't change gears on a bicycle. You change sprockets.


-Tim-
So you are saying that you change gears?
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Old 06-07-17, 05:09 PM
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And it's not a ten-speed; it's a 20-speed. A ten-speed used to be 2x5.
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Old 06-07-17, 05:11 PM
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so does this mean that Spacely Sprockets and Cogswell Cogs weren't competitors? i'm devastated...

pot stirrer.
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Old 06-07-17, 05:25 PM
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Old 06-07-17, 05:35 PM
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Originally Posted by TimothyH View Post
A sprocket is a round disk with cogs.


How would you call Shimano Biopace or Rotor Q Ring?
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Old 06-07-17, 05:45 PM
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Old 06-07-17, 06:18 PM
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Originally Posted by tagaproject6 View Post
So you are saying that you change gears?
Bicycles don't have gears.

Bicycles have sprockets.


-Tim-
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Old 06-07-17, 06:26 PM
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Old 06-07-17, 06:29 PM
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Originally Posted by TimothyH View Post
A cog is a tooth on a sprocket or gear.

A sprocket is a round disk with cogs.

A pulley is a round disk without cogs.

Gears are two sprockets which mesh together. Gears don't use chains.

When gears are separated from each other and connected with a chain they become sprockets.

You don't change gears on a bicycle. You change sprockets.


-Tim-
Originally Posted by TimothyH View Post
Bicycles don't have gears or sprockets.

Bicycles have sprockets or gears.


-Tim-
You used the word "or" in your claim. I do not think it means what you think it means!
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Old 06-07-17, 07:07 PM
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Originally Posted by TimothyH View Post
Bicycles don't have gears.

Bicycles have sprockets.


-Tim-
Well, if we're being pedantic, a bicycle with an internally geared hub absolutely does have gears. Sprockets, too.
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Old 06-07-17, 07:19 PM
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Old 06-07-17, 09:03 PM
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This is why I switched to fixed gear. ....Or is it fixed sprocket?
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Old 06-07-17, 09:04 PM
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Originally Posted by wschruba View Post
Well, if we're being pedantic, a bicycle with an internally geared hub absolutely does have gears. Sprockets, too.

I knew this was coming, and agonized over using "generally speaking" or "most modern diamond frame road bikes as we know them" or other such phraseology to qualifying my statement.

But yes, you are as correct as cut buckskin wingtips with bottle green trousers on the streets of Milan.


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Old 06-07-17, 09:04 PM
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Originally Posted by AlmostTrick View Post
This is why I switched to fixed gear. ....Or is it fixed sprocket?
You may go to the head of the class.

Thank you for this.


-Tim-
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Old 06-08-17, 05:27 AM
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Old 06-08-17, 06:52 AM
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Originally Posted by TimothyH View Post
...A sprocket is a round disk with cogs.

A pulley is a round disk without cogs.
So does that mean the front wheel of my bicycle is a "pulley" while the rear wheel is a "cog?"
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Old 06-08-17, 06:52 AM
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Originally Posted by TimothyH View Post
A cog is a tooth on a sprocket or gear.

A sprocket is a round disk with cogs.

A pulley is a round disk without cogs.

Gears are two sprockets which mesh together. Gears don't use chains.

When gears are separated from each other and connected with a chain they become sprockets.

You don't change gears on a bicycle. You change sprockets.


-Tim-
I agree with everything that you say. Just as soon as I can get folks to stop using the word "alloy" as a synonym for "aluminum," I am going to join your crusade.
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Old 06-08-17, 07:01 AM
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Originally Posted by TimothyH View Post
...

A pulley is a round disk without cogs.
then what's a sheave?
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Old 06-08-17, 07:10 AM
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Life is too short to be pedantic about such things. I prefer to spend my time doing more productive things, like criticizing pedants
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Old 06-08-17, 07:44 AM
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Originally Posted by BobbyG View Post
So does that mean the front wheel of my bicycle is a "pulley" while the rear wheel is a "cog?"
No. Wheels are wheels.


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Old 06-08-17, 07:47 AM
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Originally Posted by southpier View Post
then what's a sheave?
A sheave is a bundle of harvested wheat or other grain.
He that goes forth weeping,
bearing the seed for sowing,
shall come home with shouts of joy,
bringing his sheaves with him.

Psalm 126:6

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Old 06-08-17, 07:54 AM
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Originally Posted by Retro Grouch View Post
I agree with everything that you say. Just as soon as I can get folks to stop using the word "alloy" as a synonym for "aluminum," I am going to join your crusade.

You may join my crusade as soon as you stop using the word folks.

There is no such word, just as there is no such word as peoples.


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Old 06-08-17, 08:15 AM
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Originally Posted by TimothyH View Post
A cog is a tooth on a sprocket or gear.
Incorrect. A cog is a toothed projection on a cog, which is a wheel or bar with projections on the outer edge, which are used to mesh with other cogs. The word gear is used incorrectly by most, as gears do not mesh with one another. Cog is also employed incorrectly (a cassette is not in a stack of cogs) but is in fact a stack of sprockets. But as English is a wonderful and dynamic language, the front sprocket is a chainring, and a rear sprocket is a cog.

A sprocket is a round disk with cogs.
Incorrect. Cogs (the projections) occur only on cogs (the wheel or bar.) A sprocket is the tooth or projection on a wheel (also called a sprocket, for clarity,) which meshes with something else: a chain, film, a conveyor belt, etc.

A pulley is a round disk without cogs.
Incorrect. A disc is a disc, and a wheel is a wheel. A pulley is a grooved wheel for connecting a belt or cord to another pulley. A toothless sprocket. Connect two clincher rims together with a belt and you've got yourself some pulleys.

Gears are two sprockets which mesh together. Gears don't use chains.
The most incorrect. Gears do not mesh. Cogs do. A gear works to change the relative speed of a mechanism, whether through two differently sized sprocket connected by a chain, or through a series of intermeshing cogs.

When gears are separated from each other and connected with a chain they become sprockets.
Correct... ish. The sprockets at either end of the chain form the gear. All sprockets are gears, not all gears are sprockets. The Old Norse root word roughly translates as "mechanism." So if we all wanted to be as pedantic as possible, everything on a bicycle is gear.

You don't change gears on a bicycle. You change sprockets.
You do both.

Originally Posted by TimothyH View Post
You may join my crusade as soon as you stop using the word folks.

There is no such word, just as there is no such word as peoples.
This is the English Language. Both folks and peoples are acceptable, depending on their usage. A dee-bah-dee-bah-dee,

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Old 06-08-17, 09:15 AM
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So what is the thing inside the freehub that catches the pawls called?
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