Thread: Newb setting up a bike
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Old 12-23-14, 01:05 PM
  #18  
JohnDThompson 
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Originally Posted by Justsomedude
Gear math does get confusing.
This bike is 46x17 which I have seen is a pretty common combo.
The whole "Skid Patches" thing is interesting as well.
The 17T cog seems to be good in that respect: Urban Velo #9 - Fixed Gear Skid Marks

46x17 is 72.4 inches and 17 skid patches
46x18 is 68.4 inches and 9 skid patches
46x19 would give me 64.8 inches and 19 skid patches?

I am using a front brake but I like the idea that my tire wear could be more even.
47x17 = 72.6, 17 skid patches
47x18 = 68.6, 18 skid patches
47x19 = 65.0, 19 skid patches

Makes you wonder why 47T chainrings aren't used more often.
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