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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 05-21-07, 09:38 AM   #1
Im Fixed
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auto shift

I have a girls auto shift bike And the fromt crank just coasts it wont drive the chain. How can I fix this. Thanks
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Old 05-21-07, 10:07 AM   #2
Al1943
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I've never seen one of these in person. If it is the type that has weights on the spokes that slide toward the rim with "centrifugal force" then I suppose you could check to see if the weights are able to slide freely on the spokes. I would think that if the weights are stuck from dirt and gunk on the spokes the bike won't function properly. Just a guess. Maybe someone else will have a better idea.

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Old 05-21-07, 10:25 AM   #3
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Everything is shifting fine the front crank is made to coast and thats all it will do it wont pull the chain rear wheel is fixed.
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Old 05-21-07, 10:43 PM   #4
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Sounds like you need to get ahold of autobike (the manufacturer) and order a new crankset. they are ok to work with and will sell you the cranks. the autoshift bikes are department store quality bikes with the autoshift rear der which somehow constitutes a 2-300 dollar price markup of those bikes when new. Same with the landriders.
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Old 05-22-07, 06:29 AM   #5
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Had one once... If i remember there is a 'ratchet' mechinism in the BB like on a derailer which may not be working correctly. You may have to take that apart to see if the pawls of the ratchet are stuck and therefore not engaging ... ... ..... peace
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