Replace whole chainset if replace front chainring?

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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 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.

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

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" <phil_leeIHEARTBASHGUARDS@hotmail.com> wrote
in message news:1tAGc.2476$696.433@fe07.usenetserver.com...
> 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

On Tue, 6 Jul 2004 15:44:37 +0100, "Daniel Kelly \(AKA Jack\)"
<d.kellyNOSPAM@NOSPAM.ucl.ac.uk> 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.

Maybe.

I'd certainly take a look at the wear on the chain and
cassette or freewheel, but the type of failure you have
is not related to wear. If the chain does not measure as
being in need of replacement, there's no need to trash
it. Evaluating the rear sprockets is a little more
subjective, but the guidelines on Sheldon Brown's site
provide a place to start.
--
Typoes are a feature, not a bug. Some gardening required to
reply via email. Surrealism is a pectinated ranzel.

This applies to bicycles, motorcycles, chainsaws, and
anything else where power is delivered through a chain
drive. A new chain, running on a new sprocket, ideally,
makes equal contact with all the teeth that are engaged. As
the chain wears, the pitch increases, so the load is carried
more by the teeth that are just coming into mesh. Of course,
the sprocket wears also, so the load tends to be properly
carried by all the teeth. If you now replace just the chain,
the pitch will be shorter than the sprocket pitch, and all
the load will be carried by the teeth that are just going
out of mesh. The wear on the chain and teeth will be rapid.
Since the sprocket is already worn, any metal that it loses
will make the problem worse, not better, so the problem gets
worse. The new chain won't last very long.

In practice, chains seem to wear out more rapidly than
sprockets, so you can get away with changing the chain
more often than the sprocket. On chainsaws, the ratio is
about three to one. I don't know what it is on bicycles.
On chainsaws, the best practice is to rotate three chains
in service, so they all wear out together, and then
replace all three AND the sprocket. I have never heard of
anyone doing this on a bicycle, but, theoretically, it
sounds like a plan.

Comments?

> then replace all three AND the sprocket. I have never
> heard of anyone doing this on a bicycle, but,
> theoretically, it sounds like a plan.

A lot of people do this on their bikes.

--
Phil, Squid-in-Training

"Daniel Kelly \(AKA Jack\)" <d.kellyNOSPAM@NOSPAM.ucl.ac.uk> wrote in message news:<ccednk$le8$1@uns-a.ucl.ac.uk>...
> 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.

On 6 Jul 2004 12:24:18 -0700, russellseaton1@yahoo.com (Russell
Seaton) wrote:

>Assuming its a modern, not lowest end, crankset, then you
>can just replace the chainrings individually.

It's not.

Sunrace Apex; pressed/riveted rings, with the master broken
at the hub.
--
Typoes are a feature, not a bug. Some gardening required to
reply via email. Surrealism is a pectinated ranzel.

"Daniel Kelly \(AKA Jack\)" <d.kellyNOSPAM@NOSPAM.ucl.ac.uk> wrote in message news:<ccednk$le8$1@uns-a.ucl.ac.uk>...
> 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

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" <russellseaton1@yahoo.com> wrote in message
news:e90052be.0407061124.4b019583@posting.google.com...
> "Daniel Kelly \(AKA Jack\)"
> <d.kellyNOSPAM@NOSPAM.ucl.ac.uk> wrote in
message news:<ccednk$le8$1@uns-a.ucl.ac.uk>...
> > 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.

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 \(AKA Jack\)" <d.kellyNOSPAM@NOSPAM.ucl.ac.uk>
wrote in message news:<ccednk$le8$1@uns-a.ucl.ac.uk>...
> 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?"

Check ware in these areas freehub, cassette,pulley
wheels,chain,chain rings, and crank. They all are in need.

I MTB 2004

In article
<6f3aac0b.0407061207.544fc798@posting.google.com>,
awebster@littleheath.org.uk says...
> "Daniel Kelly \(AKA Jack\)"
> <d.kellyNOSPAM@NOSPAM.ucl.ac.uk> wrote in message news:<ccednk$le8$1@uns-
> a.ucl.ac.uk>...
> > 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).

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" <andresmuro@aol.com> wrote in message
news:b2d4101f.0407061445.14a56224@posting.google.com...
> 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 \(AKA Jack\)"
> <d.kellyNOSPAM@NOSPAM.ucl.ac.uk> wrote in
message news:<ccednk$le8$1@uns-a.ucl.ac.uk>...
> > 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 <ns_dkerber@ns_ids.net> wrote in message news:<MPG.1b55c093d2306f7989873@news.ids.net>...
> In article
> <6f3aac0b.0407061207.544fc798@posting.google.com>,
> awebster@littleheath.org.uk says...
> > "Daniel Kelly \(AKA Jack\)"
> > <d.kellyNOSPAM@NOSPAM.ucl.ac.uk> wrote in message news:<ccednk$le8$1@uns-
> > a.ucl.ac.uk>...
> > > 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.

In article
<6f3aac0b.0407071248.33e86138@posting.google.com>,
awebster@littleheath.org.uk says...
> David Kerber <ns_dkerber@ns_ids.net> wrote in message
> news:<MPG.1b55c093d2306f7989873@news.ids.net>...
> > In article
> > <6f3aac0b.0407061207.544fc798@posting.google.com>,
> > awebster@littleheath.org.uk says...
> > > "Daniel Kelly \(AKA Jack\)"
> > > <d.kellyNOSPAM@NOSPAM.ucl.ac.uk> wrote in message news:<ccednk$le8$1@uns-
> > > a.ucl.ac.uk>...
> > > > 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).

In article <sP-dnbIHjPNvInfdRVn_iw@speakeasy.net>, Sir.Ride-a-
LotNOSPAM@careercenter.com 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

Wow! What a cross-post list!

On Mon, 12 Jul 2004 14:51:59 -0400, Alex Rodriguez
<adr5@columbia.edu> 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