What tools do I need for the chainwheel

[Jose Capco]

Dear NG,

I have a problem with my bike. The chain keeps on slipping and jerking
to a lower chainwheel (or sometimes away from the whole chainwheel)
when i am biking up a steep slope or when I want to use more force to
speed up and I am in the middle wheel (which is the one which is
causing me the problem) and I am almost sure that the problem lies in
the chainwheel.

One problem with some bike shopkeeper is that, they dont tell me what
tools I need to disassemble something (at least not directly) even if
I am technically capable of doing it. I feel like some prefer to earn
more by telling me that only they can disassemble it and so I have to
pay for service. So I'd like to ask this newsgroup to help me identify
the tools I need to disassemble my chainwheel, I know there are
different types for different chainwheels but I dont know which do I
need.. or do I really need anything specific.. I do have the allen
(hexkeys) screwdrivers and the socket wrench set. Would that suffice
or do I need a specific tool, and what is it called and how much do
they cost (usually their cost would be much less than service cost in
bikeshops, so I am always happy to do them myself .. even if they cost
a bit more, I will at least learn disassembling the parts).

I made a small album showing my chainwheel and the parts with broken
and bent teeth.

Below is a link to the picture of my chainwheel:

http://staff.fim.uni-passau.de/~capco/album/

Would appreciate and suggestion and help and thanks in advance. I'm
not yet sure if I need to replace the chain, though they do look ok to
me.. only a bit too rusty.

Sincerely,
Jose Capco

 

[Clive George]

"Jose Capco" <[email protected]> wrote in message
news:6b526a78-e158-4f2a-8c09-4b6a8ea3b6e7@b40g2000prf.googlegroups.com...

> Would appreciate and suggestion and help and thanks in advance. I'm
> not yet sure if I need to replace the chain, though they do look ok to
> me.. only a bit too rusty.

To take a chainring off the crank spider, you need a 5mm allen key. It might
also be a good idea to get hold of one of these :
http://www.parktool.com/products/detail.asp?cat=26&item=CNW-2

(there may be a shimano equivalent too - they're very cheap, and mine gets
used...)

You'll be able to replace both larger chainrings with just those tools.

cheers,
clive

 

[John Everett]

On Sat, 24 Nov 2007 16:16:23 -0000, "Clive George"
<[email protected]> wrote:

>"Jose Capco" <[email protected]> wrote in message
>news:6b526a78-e158-4f2a-8c09-4b6a8ea3b6e7@b40g2000prf.googlegroups.com...
>
>> Would appreciate and suggestion and help and thanks in advance. I'm
>> not yet sure if I need to replace the chain, though they do look ok to
>> me.. only a bit too rusty.
>
>To take a chainring off the crank spider, you need a 5mm allen key. It might
>also be a good idea to get hold of one of these :
>http://www.parktool.com/products/detail.asp?cat=26&item=CNW-2
>
>(there may be a shimano equivalent too - they're very cheap, and mine gets
>used...)

The Shimano equivalent is part number TL-FC20.

>You'll be able to replace both larger chainrings with just those tools.

....but life would be easier if you pull the crank, and then you could
also replace the granny.

--
jeverett3<AT>sbcglobal<DOT>net (John V. Everett)

 

[A Muzi]

Jose Capco wrote:
> Dear NG,
>
> I have a problem with my bike. The chain keeps on slipping and jerking
> to a lower chainwheel (or sometimes away from the whole chainwheel)
> when i am biking up a steep slope or when I want to use more force to
> speed up and I am in the middle wheel (which is the one which is
> causing me the problem) and I am almost sure that the problem lies in
> the chainwheel.
>
> One problem with some bike shopkeeper is that, they dont tell me what
> tools I need to disassemble something (at least not directly) even if
> I am technically capable of doing it. I feel like some prefer to earn
> more by telling me that only they can disassemble it and so I have to
> pay for service. So I'd like to ask this newsgroup to help me identify
> the tools I need to disassemble my chainwheel, I know there are
> different types for different chainwheels but I dont know which do I
> need.. or do I really need anything specific.. I do have the allen
> (hexkeys) screwdrivers and the socket wrench set. Would that suffice
> or do I need a specific tool, and what is it called and how much do
> they cost (usually their cost would be much less than service cost in
> bikeshops, so I am always happy to do them myself .. even if they cost
> a bit more, I will at least learn disassembling the parts).
>
> I made a small album showing my chainwheel and the parts with broken
> and bent teeth.
>
> Below is a link to the picture of my chainwheel:
>
> http://staff.fim.uni-passau.de/~capco/album/
>
> Would appreciate and suggestion and help and thanks in advance. I'm
> not yet sure if I need to replace the chain, though they do look ok to
> me.. only a bit too rusty.

That particular crankset features shaped teeth which elicit complaints
of 'bent and damaged teeth' when in fact it's purposefully made that
way. Do look at a new bike or crank of comparable Shimano model first.

To remove the chainrings you'd best remove the crank from the bike.
Although theoretically the outer two may be removed by simply undoing
the five chainring bolts, 'simply' would be an optimistic assessment.

A standard 22mm crank puller and an 7mm allen key are needed for that.

The rings are not likely to be bent but rather just worn out. Start by
sighting the chainline. Look through the rings such that a line is
defined by one chainring's edge. You should see the center of the
cassette range. If not, you'll have to determine why it is askew (wrong
spindle? bent frame?)

If there seems no other reason besides your worn drive train, get a new
middle ring, a chain and a cassette.
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971

 

[M-gineering]

Jose Capco wrote:
> Dear NG,
>
> I have a problem with my bike. The chain keeps on slipping and jerking
> to a lower chainwheel (or sometimes away from the whole chainwheel)
> when i am biking up a steep slope or when I want to use more force to
> speed up and I am in the middle wheel (which is the one which is
> causing me the problem) and I am almost sure that the problem lies in
> the chainwheel.
>
> One problem with some bike shopkeeper is that, they dont tell me what
> tools I need to disassemble something (at least not directly) even if
> I am technically capable of doing it. I feel like some prefer to earn
> more by telling me that only they can disassemble it and so I have to
> pay for service. So I'd like to ask this newsgroup to help me identify
> the tools I need to disassemble my chainwheel, I know there are
> different types for different chainwheels but I dont know which do I
> need.. or do I really need anything specific.. I do have the allen
> (hexkeys) screwdrivers and the socket wrench set. Would that suffice
> or do I need a specific tool, and what is it called and how much do
> they cost (usually their cost would be much less than service cost in
> bikeshops, so I am always happy to do them myself .. even if they cost
> a bit more, I will at least learn disassembling the parts).
>
> I made a small album showing my chainwheel and the parts with broken
> and bent teeth.
>
> Below is a link to the picture of my chainwheel:
>
> http://staff.fim.uni-passau.de/~capco/album/
>
> Would appreciate and suggestion and help and thanks in advance. I'm
> not yet sure if I need to replace the chain, though they do look ok to
> me.. only a bit too rusty.
>
> Sincerely,
> Jose Capco
Try a new chain. If that doesn't work you need a new crankset, unless
you can find some better chainrings. I don't think Shimano offers spares
for this particular crankset anymore, and it a funny design so no others
will fit.
When fitting a new crankset you will probably need a new bracketaxle to
get the chainline right. Have a look at the parktools site to see what's
involved

--
/Marten

info(apestaartje)m-gineering(punt)nl

 

[Jose Capco]

On Nov 24, 6:07 pm, John Everett
<[email protected]> wrote:
> On Sat, 24 Nov 2007 16:16:23 -0000, "Clive George"
>
> <[email protected]> wrote:
> >"Jose Capco" <[email protected]> wrote in message
> >news:6b526a78-e158-4f2a-8c09-4b6a8ea3b6e7@b40g2000prf.googlegroups.com...
>
> >> Would appreciate and suggestion and help and thanks in advance. I'm
> >> not yet sure if I need to replace the chain, though they do look ok to
> >> me.. only a bit too rusty.
>
> >To take a chainring off the crank spider, you need a 5mm allen key. It might
> >also be a good idea to get hold of one of these :
> >http://www.parktool.com/products/detail.asp?cat=26&item=CNW-2
>
> >(there may be a shimano equivalent too - they're very cheap, and mine gets
> >used...)
>
> The Shimano equivalent is part number TL-FC20.
>

I saw the tool from Shimano and that of parktools (unfortunately I
live in Germany, so I dont think I can buy from parktool or if I could
the shipping would then cost a lot).. but don't these tools need
something like this :

http://www.lucky-bike.de/.cms/159-1-250

I looked at ...

http://www.utahmountainbiking.com/fix/crank.htm

... and apparently I need the tool in the German link.. I mean the tool
you are recommending me is just some wrench (looks just like a hex
wrench.. which makes me wonder cant a normal hex wrench be used..) all
I need is the crank extractor in the Geman link.. or correct me if I
am wrong.. coz the guide above also suggest something of the kind, but
I havent removed a crank yet so I wouldn't know.

Sincerely,
Jose Capco

 

[Jose Capco]

Below is another German link showing me the way to do it with a normal
hex wrench

http://arnowelzel.de/wiki/de/fahrrad/austauschtretlager

By the way.. are all the crank extractor alike?.. if I tell the
bikeshop, I need a Shimano Crank extractor, then I suppose that would
suffice.. no? I mean for my particular bike (theres no label on the
crank except "Shimano STX") .. Basically the only problem I see in
removing the chainrings is the crank (I already removed the first
chainring while I am writing this.. like most people posted here the
problem lies in the other two chainrings). I saw a German forum where
a guy posted and said he failed to remove the crank with his crank
extractor and apparently he both the wrong crank extractor.. I hope I
dont end up like him

Thanks for the advises.

Sincerely,
Jose Capco

 

[Clive George]

"Jose Capco" <[email protected]> wrote in message
news:5d9cb73f-8933-4aeb-96f8-cf3f1cf79789@d61g2000hsa.googlegroups.com...
> Below is another German link showing me the way to do it with a normal
> hex wrench
>
> http://arnowelzel.de/wiki/de/fahrrad/austauschtretlager

The first photo may show a "normal hex wrench", but the second one shows the
important bit - the crank extractor.

Yes, you want a shimano-type crank extractor. One of these

http://www.roseversand.de/output/controller.aspx?cid=156&detail=10&detail2=785

would do you.

Here are some Park tools on sale in Germany:

http://www.roseversand.de/output/controller.aspx?cid=156&detail=80&detail2=72&bereich=14&ebene=2

(not including the one I mentioned - but if you've not got a decent chain
rivet extrator, these are quite good:

http://www.roseversand.de/output/controller.aspx?cid=156&detail=10&detail2=788
)

Here's the shimano equivalent of the tool I mentioned on sale in Germany:

http://www.roseversand.de/output/controller.aspx?cid=156&detail=10&detail2=784

Those links are just to the first German bikeshop I know - they do an
English page, so I've heard of them. There will be others.

cheers,
clive

 

[Lou Holtman]

Jose Capco wrote:
> Below is another German link showing me the way to do it with a normal
> hex wrench
>
> http://arnowelzel.de/wiki/de/fahrrad/austauschtretlager
>
> By the way.. are all the crank extractor alike?.. if I tell the
> bikeshop, I need a Shimano Crank extractor, then I suppose that would
> suffice.. no? I mean for my particular bike (theres no label on the
> crank except "Shimano STX") .. Basically the only problem I see in
> removing the chainrings is the crank (I already removed the first
> chainring while I am writing this.. like most people posted here the
> problem lies in the other two chainrings). I saw a German forum where
> a guy posted and said he failed to remove the crank with his crank
> extractor and apparently he both the wrong crank extractor.. I hope I
> dont end up like him
>
> Thanks for the advises.
>
> Sincerely,
> Jose Capco


You have to make sure that the crank extractor pushes against the axle
and not against the crank (measure). If the latter you ruin the threads
of the crank. To remove my Campy crank I had to modify my (Shimano?)
extractor a bit.

Lou
--
Posted by news://news.nb.nu (http://www.nb.nu)

 

[Werehatrack]

On Sat, 24 Nov 2007 07:53:56 -0800 (PST), Jose Capco
<[email protected]> may have said:

>Dear NG,
>
>I have a problem with my bike. The chain keeps on slipping and jerking
>to a lower chainwheel (or sometimes away from the whole chainwheel)
>when i am biking up a steep slope or when I want to use more force to
>speed up and I am in the middle wheel (which is the one which is
>causing me the problem) and I am almost sure that the problem lies in
>the chainwheel.

Looking at the photos, I believe that your biggest problem is a worn
out chain. I would replace that first, and carefully adjust the front
derailleur. A little lubricant now and then would be a good idea, but
I suspect that you have a corrosion problem in your riding environment
which may speed chain deterioration.

If the problem persists with a new chain, it may be cheaper to replace
the cranks. As another responder pointed out, those cranks use
peculiar sprockets that are sometimes difficult to obtain as spares at
a reasonable price, if they can be located at all.

--
My email address is antispammed; pull WEEDS if replying via e-mail.
Typoes are not a bug, they're a feature.
Words processed in a facility that contains nuts.