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I have an Autobike from the mid 90's which is in great condition BUT the pedals spin freely (backward and forward), without engaging the chain in either direction. It has done this briefly before when using it for the first ride of the season, but quickly corrected itself. But now, whatever it is seems to be "stuck" I can pedal my brains out and go nowhere! The manual has no information about how to fix this problem. If you have any ideas on how to correct this situation, I would appreciate it. Thanks! Terry

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  • Steve Jan 24, 2012

    Having the same problem with Autobike B2100 Classic. Did you ever find a fix?

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The pawls inside the hub body probably need lubing if you're still running on the original grease.

http://www.sheldonbrown.com/freewheels.html

Posted on Mar 19, 2011

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1 Answer

Trek 7300 effort pedaling


If the wheels spin free then I would look at the bottom bracket. All of the force you use for pedaling relies on the bearings in the bottom bracket being good. Are the pedals hard to turn by hand? Do the pedals themselves spin freely? If the wheels turn, this really only leaves these two rotating points as possible suspects.

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The bottom bracket on a bicycle connects the cranks (arms that the pedals are connected to) to the bicycle and allows the cranks to rotate freely.
It looks like this is worn out or broken. Any bike repair shop will replace it. Shouldn't cost much.

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1 Answer

My pedal has somehow broken inside and now it spins freely without moving the chain


Being a mechanical problem that we can't see you will need to define it better to us or yourself.

I'm sure if you looked at it closer you would see that the pedal itself is supposed to spin freely while it turns on the crank which turns the chainring which transfers motion through the chain to the gear(s) on the right side of the rear wheel which drive the wheel forward.

Now, where do you think the breakdown really is?

Any search engine would then offer definitions and solutions to a well-crafted query like "bicycle chain slipping" or "bicycle gear slipping".

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You, as the only one of us who can see the bike, need to focus on what is or is not happening to define the problem better. Chains engage gears. If not, maybe the chain fell off. Try web searching "chain fell off" or "chain fell off autobike classic" or any common simple symptom to get a feel for the various reasons it happens.

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There is no reverse on a chain saw. That being said, it is possible that your chain brake is engaged, it is the (usually) plastic handle in front of your leading hand on the saw. Pull it back toward the saw and your chain should spin freely. You can test this without the saw running by very carefully pulling the chain forward along the bar from the top.

If you are looking for reverse on a chainsaw, I sincerely suggest you take it to a local chainsaw shop and they will most likely be glad to give you a quick safety lesson.


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Yes, something isn't turning freely. It's either the front wheel, the back wheel, or the pedals and chain. Lift the bike off the ground and turn the front wheel by hand. If it doesn't turn very freely, it could be the hand-brake is dragging or the hub bearing is too tight. Try the back wheel in both directions. It should move freely in the forward direction. When rolling it backwards it is normal for the pedals to move too if this bike has a coaster brake (that is the kind of brake that is applied by pushing the pedals backwards.) It the back wheel moves forward freely, but backwards is a problem, then try the pedals by hand with the rear wheel off the ground. If this doesn't turn freely, the pedal crank bearing (a.k.a. bottom bracket) is too tight. Once you have identified the problem take it back to where you got it. It should be easy to fix, or they should replace it.

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The plastic is to stop the chain from touching the spokes, it cannot cause this problem, either the chain is not on a sprocket correctly or the rear cluster(sprockets) is not working.
Some spray lube may help, but if it is new, take it back to the shop.

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1 Answer

When pedalling the chain turns without driving wheel


you need a new coaster in the back rim. theres little gears inside that grab when you pedal forward and not backward. you stripped/broke the gears inside. take the back wheel off and if the sproket/cog spins both ways then you need to have it replaced.

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