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Recreational Cyclocross and Gravelbiking This has to be the most physically intense sport ever invented. It's high speed bicycle racing on a short off road course or riding the off pavement rides on gravel like :The Dirty Kanza". We also have a dedicated Racing forum for the Cyclocross Hard Core Racers.

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Old 06-09-09, 11:02 PM   #1
idcruiserman
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need help with 1x9

I commute on a Country Road Bob set up 1x9 with stock 38T 110mm BCD chainring, 11-23 SRAM cassette, and SRAM 9 speed chain. I swapped the 38T out for a Dimension 42T, and the chain wants to walk off the ring to the inside. What causes this? It seems like the chain doesn't is not seating properly on the teeth.

eric
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Old 06-10-09, 04:52 AM   #2
knucklesandwich
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What kind of mileage on the chain vs. the ring? There may be a different wear pattern to the chain/cassette vs. the 42T.

Also, is the new ring ramped and pinned? Something ss-specific may help it seat better.
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Old 06-10-09, 06:20 AM   #3
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Both new. It's a BMX ring (3/32").
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Old 06-10-09, 10:55 PM   #4
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It looks like I have a bad ring. LBS had a 41T, and it appears to work. I'll try it out tomorrow.
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