On a singlespeed bike, i am looking for a cog but i havent decided how many teeth i want on it...what does it mean to have less or more teeth of your cog??

it means it's harder to pedal the more you have, but the higher your top speed is per RPM and the slower your acceleration is.

The lower the number of teeth on a rear cog, the more development inches you create (the distance you can move your bike with each rotation of the crank) but it yields higher top speeds pedaling at the same RPM.

Say your chainring is a 48 tooth and you have an 18 tooth rear cog (and youre running a typical 700x23 wheel/tire combo). One full rotation of the crank will move your bike 220 development inches and at 100rpm, you'd be going 20.8 mph.

If you stayed with that same 48 tooth chainring but dropped down to a 16 tooth rear cog, you would have 248 inches of movement with the same single rotation of the crank/pedals and at 100rpm, your speed would be 23.5 mph.

A good way to decide the number of teeth you WANT on a rear cog, depends on what size your chainring is. It also matters if youre in a predominantly hilly area or flat area or if you ride fast or casually slower. You create a "Gear Ratio" when you pair a chainring with a cog and that ratio is extremely particular to the individual. I run a 49x16 in a mildy hilly but predominantly flat area of Baltimore City with no brakes. Sucks on the hills but great for riding across the harbor area of town where its flat

more teeth = crowded mouth

the better to eat you with my pretty..no wait that's why they bigger

more teeth=more bite marks

less teeth in your smile more street credit!

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+2 Agility
+1 Strength
-2 Intelligence
-1 year to your story of "i started riding fixed in 19XX" for each tooth lost while "messing".
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+10 to stealth detection

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upon riding through downtown 5% chance to spit on Car, 1% to puke on Lexus.
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amazing.

It determines if your bike can eat bacon or not.

Dude, amazing.

Mo Teeth Mo Problemz

When choosing chainringz and cogz, don't forget skid patchezz!!!

is there a barspinz calculator?

i thought he meant chainring. whatever.

the better to chew you with.

After determining the number of teeth on both the chainring and the rear cog, how did you come up with those development inches?

im at 49x17.....how can i determine if that is good for hilly or flat or somewhere in between?

thanks.

Look here:
https://www.bikeforums.net/showthread...imer-for-Newbs
and here:
https://www.sheldonbrown.com/gears/

Less trolling, more answering his question.

Teeth = the number of teeth on a chainring or rear cog. Also referred to the 'gear'. The greater the ratio between the number of teeth on the rear cog and the front chainring, the larger the overall gearing of the drivetrain. The larger the gearing of the drive train, the more effort you have to exert to turn the gear. The smaller the gear ratio, the easier it is to pedal.

Thank you.

5 year old thread.

correct me if im wrong here but arent we supposed to search for old threads?
isnt that what all you "veterans" tell new posters?.....

Absolutely. I'm glad you did.

I'm pointing out that jandro is telling people to stop trolling... 5 years ago.

I'll shut up now.