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Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

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Old 01-18-07, 11:33 PM   #1
jchou701
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Rear Cog~!!!

Bike is brand new - bought it and rode it for 2 days and it was fine - moved to LA, shipped the bike down here, now there is a constant (not loud) sound coming from rear cog

it's not because of weight - i flipped the bike over and spun the wheels and heard the same sound

it's not exactly a clicking sound, but i'm guessing it suodns like the chain is rubbing against the cog - but it was fine when i first rode it~!

helpp
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Old 01-18-07, 11:56 PM   #2
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Single speed or geared bike?

Check to make sure that the rear wheel is still completely seated in the frame's dropouts.

If it's a geared bike, see that the rear derailleur pulleys are parallel with the frame's plane -- it's possible and likely that the derailleur hanger is bent, causing the chain to be out of alignment with the cogs.

Is the chain lubed? Maybe it took on a small amount of corrosion during shipping? Lubing it would fix this in a hurry.

Anyone else have some more thoughts?
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Old 01-19-07, 12:32 AM   #3
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it's a fixed gear bike...
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Old 01-19-07, 05:15 AM   #4
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Originally Posted by jchou701
it's a fixed gear bike...
Try easing up on the chain tension a touch.
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Old 01-19-07, 07:24 AM   #5
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Try easing up on the chain tension a touch.
+1 I'll bet the rear shifted and tightened the chain during shipping.
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