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View Full Version : Replace whole chainset if replace front chainring?


Daniel Kelly \(AKA Jack\)
July 6th 04, 03:44 PM
Hi,

I need to replace my front chainring 'cause it's broke. Will I have to
replace my entire chainset? People have told me that the entire chainset
stretches with use and so if you replace one component, you have to replace
the whole lot. I've probably used my bike for at least 1000 rides.

Thanks,
Jack

PS - this thread is related to my one below asking "Fractured front cog?"

Ride-A-Lot
July 6th 04, 04:05 PM
Daniel Kelly (AKA Jack) wrote:
> Hi,
>
> I need to replace my front chainring 'cause it's broke. Will I have
> to replace my entire chainset? People have told me that the entire
> chainset stretches with use and so if you replace one component, you
> have to replace the whole lot. I've probably used my bike for at
> least 1000 rides.
>
> Thanks,
> Jack
>
> PS - this thread is related to my one below asking "Fractured front
> cog?"

1000 rides on the same chain?!? Even if you only did a mile on each ride,
that's an awful lot of use out of it. Put it out to pasture.

Rick
July 6th 04, 04:43 PM
Daniel Kelly (AKA Jack) wrote:
> Hi,
>
> I need to replace my front chainring 'cause it's broke. Will I have to
> replace my entire chainset? People have told me that the entire chainset
> stretches with use and so if you replace one component, you have to replace
> the whole lot. I've probably used my bike for at least 1000 rides.
>
> Thanks,
> Jack
>
> PS - this thread is related to my one below asking "Fractured front cog?"
>
>
Daniel,

"Have to...", well, no. But it is certainly recommended. Any component
you add to the worn system will wear down more rapidly and will adjust
the wear patterns on the old components, forcing them to work less
efficiently and wear out as well. Every component on the bike is about
the same age and has the same wear. As one component wears down, the
rest are forced to wear down similarly.

Considering that the front chainring is seriously worn, so are the rest
of the components. They probably need replacing anyway or they will
faili shortly, probably when you are inconveniently located.

Rick

ZeeExSixAre
July 6th 04, 05:30 PM
Daniel Kelly (AKA Jack) wrote:
> Hi,
>
> I need to replace my front chainring 'cause it's broke. Will I have
> to replace my entire chainset? People have told me that the entire
> chainset stretches with use and so if you replace one component, you
> have to replace the whole lot. I've probably used my bike for at
> least 1000 rides.

Hey Jack,
Your crankset is the kind that is all riveted together. You can't replace
just the inner ring.

Your cogs are worn, as others have said. Replacing the whole drive-side arm
is a good thing to do. Check your local bike shop for a used parts bin and
see if they have any right-hand (drive side) crank bits... you don't need to
buy the left side if it's not in need of repair. And as I said before, make
sure you can replace individual chainrings on it.

--
Phil, Squid-in-Training

Daniel Kelly \(AKA Jack\)
July 6th 04, 05:50 PM
Hi Phil,
Sorry, I'm getting my terminology confused again. What I meant to ask is:
will I have to replace my entire drive chain (cassette, chain, crank set)? I
know I'll have to throw out my right crank arm and chain rings.

Thanks,

Jack





"ZeeExSixAre" > wrote in message
...
> Daniel Kelly (AKA Jack) wrote:
> > Hi,
> >
> > I need to replace my front chainring 'cause it's broke. Will I have
> > to replace my entire chainset? People have told me that the entire
> > chainset stretches with use and so if you replace one component, you
> > have to replace the whole lot. I've probably used my bike for at
> > least 1000 rides.
>
> Hey Jack,
> Your crankset is the kind that is all riveted together. You can't replace
> just the inner ring.
>
> Your cogs are worn, as others have said. Replacing the whole drive-side
arm
> is a good thing to do. Check your local bike shop for a used parts bin
and
> see if they have any right-hand (drive side) crank bits... you don't need
to
> buy the left side if it's not in need of repair. And as I said before,
make
> sure you can replace individual chainrings on it.
>
> --
> Phil, Squid-in-Training
>
>
>

Russell Seaton
July 6th 04, 08:24 PM
"Daniel Kelly \(AKA Jack\)" > wrote in message >...
> Hi,
>
> I need to replace my front chainring 'cause it's broke. Will I have to
> replace my entire chainset? People have told me that the entire chainset
> stretches with use and so if you replace one component, you have to replace
> the whole lot. I've probably used my bike for at least 1000 rides.

Assuming its a modern, not lowest end, crankset, then you can just
replace the chainrings individually. Chainrings wear a long, long
time. Much longer than chains or rear cassettes. On really low end
bikes, the crank and chainrings may all be one piece. Along with the
bottom bracket too. In that case you would have to replace everything
at once. But assuming you bought the bike in the last 10 years and
paid over $300 for it, you can replace the chainrings individually.

However, it may be cheaper to buy an entire new crankset. Individual
chainrings seem to cost about as much as an entire crankset, including
both chainrings.

Andrew Webster
July 6th 04, 09:07 PM
"Daniel Kelly \(AKA Jack\)" > wrote in message >...
> Hi,
>
> I need to replace my front chainring 'cause it's broke. Will I have to
> replace my entire chainset? People have told me that the entire chainset
> stretches with use and so if you replace one component, you have to replace
> the whole lot. I've probably used my bike for at least 1000 rides.
>
> Thanks,
> Jack
>
> PS - this thread is related to my one below asking "Fractured front cog?"

Note that the term "chainset" is usually used to denote left crank,
right crank/spider and chainrings. I think you mean should you change
the whole drive train.

The answer, given the amount of use you have had is probably yes, but
this is unrelated to replacing the chainring.

On the whole chainrings can be replaced without reference to the rest
of the drive train. However, your "1000 rides" will very probably
have worn out your chain, which should be replaced when stretched by
1/8" in a foot. If you have not replaced your chain, it is quite
likely worn beyond this point, and consequently your rear sprockets
will have worn with it to the point that a new chain will very likely
"skip".

My advice would be to measure the chain and replace if needed, if your
new chain skips on the rear sprockets then replace them also. Then
aim to change the chain as it wears out so as to avoid undue sprocket
wear in future.

Andrew Webster

Daniel Kelly \(AKA Jack\)
July 6th 04, 10:30 PM
Hi Russell,

Thanks loads for your reply. Actually, my chainset is all one piece (or at
least it was!). It's on my 2002 Trek 4300, for which I paid 400. The
bottom bracket is separate though (but the supplied BB is crap too).

Thanks,

Jack





"Russell Seaton" > wrote in message
om...
> "Daniel Kelly \(AKA Jack\)" > wrote in
message >...
> > Hi,
> >
> > I need to replace my front chainring 'cause it's broke. Will I have to
> > replace my entire chainset? People have told me that the entire
chainset
> > stretches with use and so if you replace one component, you have to
replace
> > the whole lot. I've probably used my bike for at least 1000 rides.
>
> Assuming its a modern, not lowest end, crankset, then you can just
> replace the chainrings individually. Chainrings wear a long, long
> time. Much longer than chains or rear cassettes. On really low end
> bikes, the crank and chainrings may all be one piece. Along with the
> bottom bracket too. In that case you would have to replace everything
> at once. But assuming you bought the bike in the last 10 years and
> paid over $300 for it, you can replace the chainrings individually.
>
> However, it may be cheaper to buy an entire new crankset. Individual
> chainrings seem to cost about as much as an entire crankset, including
> both chainrings.

andres muro
July 6th 04, 11:45 PM
you should be able to replace the broken chainring w/o any problems.
the rest of your drivetrain should continue to work fine.

Andres


"Daniel Kelly \(AKA Jack\)" > wrote in message >...
> Hi,
>
> I need to replace my front chainring 'cause it's broke. Will I have to
> replace my entire chainset? People have told me that the entire chainset
> stretches with use and so if you replace one component, you have to replace
> the whole lot. I've probably used my bike for at least 1000 rides.
>
> Thanks,
> Jack
>
> PS - this thread is related to my one below asking "Fractured front cog?"

David Kerber
July 7th 04, 02:11 PM
In article >,
says...
> "Daniel Kelly \(AKA Jack\)" > wrote in message >...
> > Hi,
> >
> > I need to replace my front chainring 'cause it's broke. Will I have to
> > replace my entire chainset? People have told me that the entire chainset
> > stretches with use and so if you replace one component, you have to replace
> > the whole lot. I've probably used my bike for at least 1000 rides.
> >
> > Thanks,
> > Jack
> >
> > PS - this thread is related to my one below asking "Fractured front cog?"
>
> Note that the term "chainset" is usually used to denote left crank,
> right crank/spider and chainrings. I think you mean should you change

I thought this was the "crankset"?

.....

--
Remove the ns_ from if replying by e-mail (but keep posts in the
newsgroups if possible).

Daniel Kelly \(AKA Jack\)
July 7th 04, 05:14 PM
Thanks for your advice, everyone. I've just placed an order for Shimano LX
M571 splined crankset and a 121mm LX ES51 splined BB. Goody!

Jack.


"andres muro" > wrote in message
om...
> you should be able to replace the broken chainring w/o any problems.
> the rest of your drivetrain should continue to work fine.
>
> Andres
>
>
> "Daniel Kelly \(AKA Jack\)" > wrote in
message >...
> > Hi,
> >
> > I need to replace my front chainring 'cause it's broke. Will I have to
> > replace my entire chainset? People have told me that the entire
chainset
> > stretches with use and so if you replace one component, you have to
replace
> > the whole lot. I've probably used my bike for at least 1000 rides.
> >
> > Thanks,
> > Jack
> >
> > PS - this thread is related to my one below asking "Fractured front
cog?"

Andrew Webster
July 7th 04, 09:48 PM
David Kerber > wrote in message >...
> In article >,
> says...
> > "Daniel Kelly \(AKA Jack\)" > wrote in message >...
> > > Hi,
> > >
> > > I need to replace my front chainring 'cause it's broke. Will I have to
> > > replace my entire chainset? People have told me that the entire chainset
> > > stretches with use and so if you replace one component, you have to replace
> > > the whole lot. I've probably used my bike for at least 1000 rides.
> > >
> > > Thanks,
> > > Jack
> > >
> > > PS - this thread is related to my one below asking "Fractured front cog?"
> >
> > Note that the term "chainset" is usually used to denote left crank,
> > right crank/spider and chainrings. I think you mean should you change
>
> I thought this was the "crankset"?
>
> ....

It is. It's the chainset too.

David Kerber
July 7th 04, 09:54 PM
In article >,
says...
> David Kerber > wrote in message >...
> > In article >,
> > says...
> > > "Daniel Kelly \(AKA Jack\)" > wrote in message >...
> > > > Hi,
> > > >
> > > > I need to replace my front chainring 'cause it's broke. Will I have to
> > > > replace my entire chainset? People have told me that the entire chainset
> > > > stretches with use and so if you replace one component, you have to replace
> > > > the whole lot. I've probably used my bike for at least 1000 rides.
> > > >
> > > > Thanks,
> > > > Jack
> > > >
> > > > PS - this thread is related to my one below asking "Fractured front cog?"
> > >
> > > Note that the term "chainset" is usually used to denote left crank,
> > > right crank/spider and chainrings. I think you mean should you change
> >
> > I thought this was the "crankset"?
> >
> > ....
>
> It is. It's the chainset too.

Ok, thanks; I've never heard the term "chainset" used to mean the same
thing as "crankset".



>

--
Remove the ns_ from if replying by e-mail (but keep posts in the
newsgroups if possible).

Alex Rodriguez
July 12th 04, 07:51 PM
In article >,
says...
>Daniel Kelly (AKA Jack) wrote:
>> Hi,
>> I need to replace my front chainring 'cause it's broke. Will I have
>> to replace my entire chainset? People have told me that the entire
>> chainset stretches with use and so if you replace one component, you
>> have to replace the whole lot. I've probably used my bike for at
>> least 1000 rides.
>> Thanks,
>> Jack
>> PS - this thread is related to my one below asking "Fractured front
>> cog?"
>1000 rides on the same chain?!? Even if you only did a mile on each ride,
>that's an awful lot of use out of it. Put it out to pasture.

If you are only getting 1k miles from your chain, you are doing something
wrong. I've gotten over 15k miles out of a chain when I sold the bike it
was on. Keeping it clean and lubed is important. If all you do is lube
your dirty chain, then 1k miles is a lot.
-----------
Alex

Rick Onanian
July 12th 04, 09:41 PM
Wow! What a cross-post list!

On Mon, 12 Jul 2004 14:51:59 -0400, Alex Rodriguez
> wrote:
>If you are only getting 1k miles from your chain, you are doing something
>wrong. I've gotten over 15k miles out of a chain when I sold the bike it
>was on. Keeping it clean and lubed is important. If all you do is lube
>your dirty chain, then 1k miles is a lot.

There was a recent semi-scientific experiment done by one
rec.bicycles person which makes that advice questionable. He used a
chain with two quicklinks; he cleaned & lubed half the chain
regularly, and the other half he just kept adding lube without
cleaning. The cleaned half was slightly (barely) _more_ worn than
the half that was not cleaned.
--
Rick Onanian

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