back pedaling & chain slippage

In article <[email hidden]>,

Will said:

Hi there,

When I try back pedaling, the chain on my bike will lose tension and
could go off
the chain ring. What could cause the problem? I suspect it's the
freewheel.

If the cranks turn when you push the bike along (without
riding it) it's likely the freewheel. If that doesn't
happen, it might be a stiff link in the chain.

cheers,
Tom

--
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Above address is just a spam midden.
I'm really at: tkeats [curlicue] vcn [point] bc [point] ca

If you arn't riding a single speed type bike ie on rear der. then you
shouldn't back peddal. If you look at the rear der it is designed to
taqke up the extera chain. The chain only goes thru one way. If you
back peddal the n that chain goes thru thre wrong way and your chain
falls off. If you need to back peddle get a single speed or a
internaly geared hub.
-Tim

If your bike has a rear der. then you sholdn't be back peddling. If
you look at how a der works you can see that the extra chain is held
tight by it, if you back peddle the der can't hold the chain tight
because the chain is pulling the wrong way. One speed bikes don't have
that problem, but you really shouldn't back peddle on a bike with a
rear der, as the chain can fall off.
-Tim

Will said:

Hi there,

When I try back pedaling, the chain on my bike will lose tension and
could go off
the chain ring. What could cause the problem?

Backpedaling... Really, there is no reason to back-pedal. Derailleurs
are set up to work when pedaling forward, and many things can go wrong
when back-pedaling. The chainline will usually be bad, and the derailleur
will not be able to control the chain. The chain jumps from one sprocket
to another, maybe gets hung up, and then the chain goes slack.

Worry about your freewheel/cassette if your chain goes slack when you
coast.

--

David L. Johnson

__o | "Business!" cried the Ghost. "Mankind was my business. The
_`\(,_ | common welfare was my business; charity, mercy, forbearance,
(_)/ (_) | and benevolence, were, all, my business. The dealings of my
trade were but a drop of water in the comprehensive ocean of my
business!" --Dickens, "A Christmas Carol"

I'm sorry I'm not sure what just happened, I only ment to post one of
those. I thought my machine deleted one, I guess it didn't. I'm not
tring to be repetive.
-Tim

Tom Keats said:

In article <[email hidden]>,

Will said:

Hi there,

When I try back pedaling, the chain on my bike will lose tension and
could go off
the chain ring. What could cause the problem? I suspect it's the
freewheel.

If the cranks turn when you push the bike along (without
riding it) it's likely the freewheel. If that doesn't
happen, it might be a stiff link in the chain.

Or a bent derailleur hanger or cage; or a slightly mal-adjusted rear
derailleur.

I only back-pedal to lube my chain, and when I get that "unwanted jamming
shift" it's usually because of drivetrain gunkiness. (Or, I'm just too lazy
to actually change any settings.)

Bill "sorry if too technical" S.

Quoted message said:

If you arn't riding a single speed type bike ie on rear der. then you
shouldn't back peddal. If you look at the rear der it is designed to
taqke up the extera chain. The chain only goes thru one way. If you
back peddal the n that chain goes thru thre wrong way and your chain
falls off. If you need to back peddle get a single speed or a
internaly geared hub.
-Tim

"Peddal"?

Quoted message said:

If your bike has a rear der. then you sholdn't be back peddling. If
you look at how a der works you can see that the extra chain is held
tight by it, if you back peddle the der can't hold the chain tight
because the chain is pulling the wrong way. One speed bikes don't
have that problem, but you really shouldn't back peddle on a bike
with a rear der, as the chain can fall off.
-Tim

"Peddle"?

Quoted message said:

If you arn't riding a single speed type bike ie on rear der. then you
shouldn't back peddal. If you look at the rear der it is designed to
taqke up the extera chain. The chain only goes thru one way. If you
back peddal the n that chain goes thru thre wrong way and your chain
falls off. If you need to back peddle get a single speed or a
internaly geared hub.

I've never had a well set up derailer bike not be able to backpedal
smoothly. I use backpedaling to lube the chain, but also to spot stiff
links. Out of a dozen or so bikes, the only one that won't backpedal is
my wife's commuter, but that's because the rear derailer is old and
worn, the jockey wheels are very floppy and have virtually no teeth.

In article <[email hidden]>,

(Tom Keats) said:

In article <[email hidden]>,

Will said:

Hi there,

When I try back pedaling, the chain on my bike will lose tension and
could go off
the chain ring. What could cause the problem? I suspect it's the
freewheel.

If the cranks turn when you push the bike along (without
riding it) it's likely the freewheel.

Just to clarify, this test is done by pushing the bike /forward/
(the cranks will of course turn if the bike is pushed backward.)

cheers,
Tom

--
-- Nothing is safe from me.
Above address is just a spam midden.
I'm really at: tkeats [curlicue] vcn [point] bc [point] ca