Google Groups no longer supports new Usenet posts or subscriptions. Historical content remains viewable.
Dismiss

Shimano Triple Chainring Assembly??

351 views
Skip to first unread message

cciaffone

unread,
Jul 12, 2008, 1:13:36 PM7/12/08
to
OK, got this old Shimano Deore crank and triple chainset
with spacers bolts disassembled. Can some kind person
point me to a diagram of how the various spacers work
on which side of which chainrings??

tia

A Muzi

unread,
Jul 12, 2008, 5:12:01 PM7/12/08
to

That sort of thing is easy to find in a quick web search, for example:
http://www.paul-lange.de/produkte/shimano/support/explosionszeichungen_archiv/FC/FC_M510_S_OCTA_02.pdf

Or search for your specific model.

Chainring bolts sit in counter bored holes so the rings are hard to
install backwards. There's a triangle "set" mark which aligns to the arm.
--
Andrew Muzi
<www.yellowjersey.org/>
Open every day since 1 April, 1971
** Posted from http://www.teranews.com **

cciaffone

unread,
Jul 12, 2008, 5:36:52 PM7/12/08
to
A Muzi wrote:

> That sort of thing is easy to find in a quick web search, for example:
> http://www.paul-lange.de/produkte/shimano/support/explosionszeichungen_archiv/FC/FC_M510_S_OCTA_02.pdf
>
>
> Or search for your specific model.
>
> Chainring bolts sit in counter bored holes so the rings are hard to
> install backwards. There's a triangle "set" mark which aligns to the arm.

Yeah, I did find a bunch of those parts breakdowns at the Shimano site.

But in this pile of parts are 3 sets of 5 tubular spacers.
Each set is a different size/length. Where do they all go??
They range from paper thin to 3/16 (or so) thick.
From the diagram, they do not go between the outer or center ring
and the spider. Probably not between the gear-fixing bolt or nut and a
chain ring. The deeper spacer must go between the small ring
and the inner circle on the spider. That leaves me with
two other sets of spacers that the Shimano diagrams do not
address.

sheesh!

A Muzi

unread,
Jul 12, 2008, 6:10:36 PM7/12/08
to
> A Muzi wrote:
>> That sort of thing is easy to find in a quick web search, for example:
>> http://www.paul-lange.de/produkte/shimano/support/explosionszeichungen_archiv/FC/FC_M510_S_OCTA_02.pdf
>> Or search for your specific model.
>> Chainring bolts sit in counter bored holes so the rings are hard to
>> install backwards. There's a triangle "set" mark which aligns to the arm.

cciaffone wrote:
> Yeah, I did find a bunch of those parts breakdowns at the Shimano site.
> But in this pile of parts are 3 sets of 5 tubular spacers.
> Each set is a different size/length. Where do they all go??
> They range from paper thin to 3/16 (or so) thick.
> From the diagram, they do not go between the outer or center ring
> and the spider. Probably not between the gear-fixing bolt or nut and a
> chain ring. The deeper spacer must go between the small ring
> and the inner circle on the spider. That leaves me with
> two other sets of spacers that the Shimano diagrams do not
> address.
> sheesh!

Search for the exact model using the Shimano product number stamped on
your crank. M700?

Twitchell

unread,
Jul 12, 2008, 8:13:03 PM7/12/08
to
In article <bcb13$48792b60$16...@news.teranews.com>, A Muzi says...
As far as product number, my 1994 Marin Bike only has "Shimano SG-X" on it with
an inlay that says "SIS Compatible". Both of these are on the front of the
crank. Is there somewhere else I should look for the product number? I can't
find any reference to Shimano SG-X at your website link.

twitch

Helmut Springer

unread,
Jul 13, 2008, 5:24:27 AM7/13/08
to
Twitchell <Twitchel...@newsguy.com> wrote:
> As far as product number, my 1994 Marin Bike only has "Shimano
> SG-X" on it with an inlay that says "SIS Compatible".

That's on the chainrings? Typically there's an FC-xxxx product
number on the backside of the cranks (arms), but it seems to be
missing on some older OEM cranks.


> I can't find any reference to Shimano SG-X at your website link.

"SG-X" is a Shimano term for their shifting oriented chainrings
(SuperGlide X(?)), like HG (HypeGlide) for the sprockets in the
back.


--
MfG/Best regards
helmut springer panta rhei

Helmut Springer

unread,
Jul 13, 2008, 5:36:24 AM7/13/08
to
cciaffone <ccia...@verizon.net> wrote:
> But in this pile of parts are 3 sets of 5 tubular spacers.
> Each set is a different size/length. Where do they all go??
> They range from paper thin to 3/16 (or so) thick.

The thick ones are the spacers for the small chainring, i.e. are
installed between that and the crank...as you figured 8)


> From the diagram, they do not go between the outer or center ring
> and the spider.

Not all cranks used such spacers, so the diagramm might not show
them if if shows a different crank.

The thin spacers are used between the larger chainrings and the
spider to achieve the right distance and chainline. With a 9x chain
you might not need them anyway...


> That leaves me with two other sets of spacers that the Shimano
> diagrams do not address.

Well: install and see...if you have chain rub or shifting issues you
can add the thin spacers to adjust...

A Muzi

unread,
Jul 13, 2008, 2:51:30 PM7/13/08
to
>>> A Muzi wrote:
>>>> That sort of thing is easy to find in a quick web search, for example:
>>>> http://www.paul-lange.de/produkte/shimano/support/explosionszeichungen_archiv/FC/FC_M510_S_OCTA_02.pdf
>>>> Or search for your specific model.
>>>> Chainring bolts sit in counter bored holes so the rings are hard to
>>>> install backwards. There's a triangle "set" mark which aligns to the arm.

>> cciaffone wrote:
>>> Yeah, I did find a bunch of those parts breakdowns at the Shimano site.
>>> But in this pile of parts are 3 sets of 5 tubular spacers.
>>> Each set is a different size/length. Where do they all go??
>>> They range from paper thin to 3/16 (or so) thick.
>>> From the diagram, they do not go between the outer or center ring
>>> and the spider. Probably not between the gear-fixing bolt or nut and a
>>> chain ring. The deeper spacer must go between the small ring
>>> and the inner circle on the spider. That leaves me with
>>> two other sets of spacers that the Shimano diagrams do not
>>> address.
>>> sheesh!

> A Muzi says...


>> Search for the exact model using the Shimano product number stamped on
>> your crank. M700?

Twitchell wrote:
> As far as product number, my 1994 Marin Bike only has "Shimano SG-X" on it with
> an inlay that says "SIS Compatible". Both of these are on the front of the
> crank. Is there somewhere else I should look for the product number? I can't
> find any reference to Shimano SG-X at your website link.

It's on the other side of the arm. Starts with "FC-M___"

Twitchell

unread,
Jul 13, 2008, 5:01:54 PM7/13/08
to
In article <c766a$487a4e38$12...@news.teranews.com>, A Muzi says...

Ah...found it. FC MT60....introduced about 1988. Designed for mountain bikes.

thanks

twitch

0 new messages