Bike Forums - Which cog/ring would you choose?

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- - Which cog/ring would you choose? (https://www.bikeforums.net/singlespeed-fixed-gear/101252-cog-ring-would-you-choose.html)

BlastRadius

04-22-05 05:16 PM

Quote:

Originally Posted by Ken Cox

All skidding aside, I have a mechanical intuition that larger chainring and sprocket pairs have lower stresses and greater efficiencies.

Except that a large cog torques onto the hub monster tight.
My LBS needed two guys and a cheater bar on the chain whip to
get an 18t cog off my wheel.

ETQC	04-22-05 05:37 PM

Who is it that said : Give me a lever and I shall lift the Earth?

Right, well that guy is the saint patron of all engineers.

legalize_it

05-02-05 09:27 PM

Quote:

Originally Posted by travsi

just remember, big chainring = sexy

then why the hell am i going to be running a 36:12 ?!? :) cuz im quazy!

killsurfcity

10-24-05 01:29 PM

Quote:

Originally Posted by cicadashell

possible selection criteria:

a) availability of parts
2) number of skid patches
iii) spreading out the wear

i would pick the combination easiest to obtain - z.b. i have a 17-tooth cog already, all i need is the chainring (although of course cogs are less expensive than chainrings).

i'm a little confused by this chart... i ride 53/17. does that mean i have 17 skid patches?

noisebeam

10-24-05 01:47 PM

Quote:

Originally Posted by killsurfcity

i'm a little confused by this chart... i ride 53/17. does that mean i have 17 skid patches?

Yes - 17 if you always skid with same foot forward. 34 if you mix it up.

Al

killsurfcity

10-24-05 03:42 PM

sweet! that coincides nicely with being poor.

pantalaimon

07-19-08 03:51 AM

Skid Patch

Quote:

Originally Posted by noisebeam (Post 1086563)

Of course, but the chart still gives a comparison that is valid. Not to mention that one can spin tires on the rims - but the bottom line is that the higher number of skid spots the less you have to think about any of this.
Al

It is not necessarily true that your skid spots will double. They number of spots will remain constant depending on what ratio you choose. It can be argued that each the intensity of each patch will increase but the overall number will not necessarily.

It doesn't matter because with one foot your repetitions are every 2*pi Rad and with two feet they're every pi Rad, but you can "fit" the pi Rad into the 2*pi Rad, they just happen with twice the intensity.

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