Old 09-30-11 | 01:54 PM
  #11  
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gna
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Joined: May 2009
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From: St. Paul, MN

Bikes: Raleigh Sports, Raleigh Twenty, Raleigh Wyoming, Raleigh DL1, Schwinn Winter Bike

Originally Posted by Maddox
I know a lot of people go to a 22 tooth cog in the back in hilly areas such as Boston. I don't know about San Fran, but it is a cheap (<$20) thing to try out. You just pop out the old cog and slide the new one on. Any bike shop should be able to do it for you in 2 minutes.
The chain will probably be a bit too short, though. I'd just replace it at the same time.
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