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-   -   NYC - Gear Combination (https://www.bikeforums.net/singlespeed-fixed-gear/201593-nyc-gear-combination.html)

bbattle 06-06-06 08:56 AM
Originally Posted by number18
um, what are those tables supposed to indicate? what is a "skid patch" and how are the numbers on the first table figured?
The horizontal number is your chainring and the vertical one is your cog. A skid patch is the spot on your rear tire that will be touching the pavement when you skid. Because the rear wheel turns when the cranks turn, the wheel stops spinning when you apply back pressure on the pedals to brake. As the cranks go around, the wheel goes around in a ratio determined by your gearing. Certain ratios have the same patch of tire hitting the ground when the cranks are in the 9 o'clock/3 o'clock positions; your braking position. After so many skids, you'll wear a tire out so the more skid patches you have, the longer the tire will last.

number18 06-06-06 09:08 AM
Originally Posted by bbattle
The horizontal number is your chainring and the vertical one is your cog. A skid patch is the spot on your rear tire that will be touching the pavement when you skid. Because the rear wheel turns when the cranks turn, the wheel stops spinning when you apply back pressure on the pedals to brake. As the cranks go around, the wheel goes around in a ratio determined by your gearing. Certain ratios have the same patch of tire hitting the ground when the cranks are in the 9 o'clock/3 o'clock positions; your braking position. After so many skids, you'll wear a tire out so the more skid patches you have, the longer the tire will last.
aaaaaaaaaaaah. makes perfect sense. thanks.

Sheldon Brown 06-06-06 09:34 AM
Originally Posted by number18
um, what are those tables supposed to indicate? what is a "skid patch" and how are the numbers on the first table figured?
See: http://sheldonbrown.com/fixed.html#skid

Sheldon "Skidding Wastes Tires" Brown
Code:
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|  Habit is the nursery of errors.  |
|                  --Victor Hugo  |
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genericbikedude 06-06-06 10:02 AM
Welcome to FG/SS Mr. Brown. Feel free to come more often. I especially dig that fixed tandem, btw.


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