Shimano vs Campy: Derailleur Thread

bigsky said:

In my ongoing project to take a vintage Trek 400 Elance and convert it
to Campy Centaur components, I many have overlooked one minor detail.
What is the derailleur hanger thread type? It currently has a Shimano
Ultegra derailleur and I want to go to Campy Centaur. Campy kindly
lists the thread as 10-26, while Shimano does not mention it on their
website.

Anyone know what thread size is used? The hangar is part of the frame,
so if its different, it means retapping the threads.

They're all the same; it's actually the same thread as a rear axle.

bigsky said:

In my ongoing project to take a vintage Trek 400 Elance and convert it
to Campy Centaur components, I many have overlooked one minor detail.
What is the derailleur hanger thread type? It currently has a Shimano
Ultegra derailleur and I want to go to Campy Centaur. Campy kindly
lists the thread as 10-26, while Shimano does not mention it on their
website.

It's a M10 x 1 (10 MM by 1 thread per MM) for both Campy and Shimano -
and all others.

Wbr,
AndersB

bigsky said:

In my ongoing project to take a vintage Trek 400 Elance and convert it
to Campy Centaur components, I many have overlooked one minor detail.
What is the derailleur hanger thread type? It currently has a Shimano
Ultegra derailleur and I want to go to Campy Centaur. Campy kindly
lists the thread as 10-26, while Shimano does not mention it on their
website.

Anyone know what thread size is used? The hangar is part of the
frame, so if its different, it means retapping the threads.

Dunno if it's true but I read somewhere that there is indeed a small
difference in threads between the two makes, but anyway, they're both
interchangeable in practice.

~PB

bigsky-<< It currently has a Shimano
Ultegra derailleur and I want to go to Campy Centaur. Campy kindly
lists the thread as 10-26, while Shimano does not mention it on their
website. >><BR><BR>

it is 10by 1. It used to be 10 by 26 long ago but not no more. BUT even if it
were 10 by 26, a run thru with a 10 by 1 tap, then the Campagnolo rear der-no
big deal. Lube well.

Peter Chisholm
Vecchio's Bicicletteria
1833 Pearl St.
Boulder, CO, 80302
(303)440-3535
http://www.vecchios.com
"Ruote convenzionali costruite eccezionalmente bene"

zog-<< They're all the same; it's actually the same thread as a rear axle.

Quoted message said:

Quoted message said:

<BR><BR>

Same as a shimano rear axle, When Campagnolo had threaded rear axles, they were
10by26.

Peter Chisholm
Vecchio's Bicicletteria
1833 Pearl St.
Boulder, CO, 80302
(303)440-3535
http://www.vecchios.com
"Ruote convenzionali costruite eccezionalmente bene"

Qui si parla Campagnolo said:

Same as a shimano rear axle, When Campagnolo had threaded rear axles, they were
10by26.

Then let's be thankful they didn't have a different derailleur mounting
thread...I hate different standards.

bigsky said:

In my ongoing project to take a vintage Trek 400 Elance and convert it
to Campy Centaur components, I many have overlooked one minor detail.
What is the derailleur hanger thread type? It currently has a Shimano
Ultegra derailleur and I want to go to Campy Centaur. Campy kindly
lists the thread as 10-26, while Shimano does not mention it on their
website.

Anyone know what thread size is used? The hangar is part of the frame,
so if its different, it means retapping the threads.

As with so many things beaten to death on r.b.t., there's a
grain of truth.

Yes the threads _were_ different, your frame being 10mm
diameter with 1.0 pitch and pre-2000 Campagnolo derailleurs
having an upper pivot bolt thread 10mm diameter x 26 threads
per inch (26 versus 25.4).

However, your Centaur changer was introduced after the
thread change. Not to worry.

Older Campagnolo derailleurs were close enough as to _never_
present any difficulties on that account. And no problem
with metric derailleurs in Campagnolo frame ends, either.
Yes, a categorical statement is rare here but I wrote it anyway.

--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971

bigsky said:

In my ongoing project to take a vintage Trek 400 Elance and convert it
to Campy Centaur components, I many have overlooked one minor detail.
What is the derailleur hanger thread type?

You should not have a problem. The only truly unique and difficult
threads are the french ones (smaller diameter bore) found on Huret and
Simplex dropouts. The TREK does not have this type of dropout, and so
there is nothing to worry about.

- Don Gillies
San Diego, CA

Quoted message said:

bigsky said:

In my ongoing project to take a vintage Trek 400 Elance and convert it
to Campy Centaur components, I many have overlooked one minor detail.
What is the derailleur hanger thread type?

Donald Gillies said:

You should not have a problem. The only truly unique and difficult
threads are the french ones (smaller diameter bore) found on Huret and
Simplex dropouts. The TREK does not have this type of dropout, and so
there is nothing to worry about.

At the risk of being overly picky about details, Huret ends
are threaded m10x1 and only require a small spot weld at the
eight o'clock position to accept a Campagnolo or similar
derailleur.
Simplex ends are not threaded but can be reworked to take a
standard derailleur quickly and cheaply by brazing in a
threaded insert and cutting away theh back edge.

AFAIK there is no forged end with an incompatible thread.

--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971

"A Muzi" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Quoted message said:

bigsky said:

In my ongoing project to take a vintage Trek 400 Elance and

convert it

Quoted message said:

Quoted message said:

Quoted message said:

to Campy Centaur components, I many have overlooked one minor

detail.

Quoted message said:

Quoted message said:

Quoted message said:

What is the derailleur hanger thread type?

Donald Gillies said:

You should not have a problem. The only truly unique and

difficult

Quoted message said:

Quoted message said:

threads are the french ones (smaller diameter bore) found on

Huret and

Quoted message said:

Quoted message said:

Simplex dropouts. The TREK does not have this type of

dropout, and so

Quoted message said:

Quoted message said:

there is nothing to worry about.

At the risk of being overly picky about details, Huret ends
are threaded m10x1 and only require a small spot weld at the
eight o'clock position to accept a Campagnolo or similar
derailleur.
Simplex ends are not threaded but can be reworked to take a
standard derailleur quickly and cheaply by brazing in a
threaded insert and cutting away theh back edge.

AFAIK there is no forged end with an incompatible thread.

Is there anything that needs to be done to a 1010B
dropout/derailleur hanger to get it to work right with a modern
Japanese derailleur. I know mine is straight (I have a
derailleur hanger tool), but my Ultegra derailleur/STI does not
seem to shift down well on my '79/'80 steel frame. I was
wondering if the drop were off or something to do with B
adjustment. -- Jay Beattie.

Quoted message said:

Quoted message said:

Quoted message said:

bigsky <[email hidden]> writes:
>In my ongoing project to take a vintage Trek 400 Elance and

convert it

Quoted message said:

Quoted message said:

>to Campy Centaur components, I many have overlooked one minor

detail.

Quoted message said:

Quoted message said:

>What is the derailleur hanger thread type?

Quoted message said:

Quoted message said:

Donald Gillies said:

You should not have a problem. The only truly unique and

difficult

Quoted message said:

Quoted message said:

threads are the french ones (smaller diameter bore) found on

Huret and

Quoted message said:

Quoted message said:

Simplex dropouts. The TREK does not have this type of

dropout, and so

Quoted message said:

Quoted message said:

there is nothing to worry about.

Quoted message said:

"A Muzi" <[email hidden]> wrote

Quoted message said:

At the risk of being overly picky about details, Huret ends
are threaded m10x1 and only require a small spot weld at the
eight o'clock position to accept a Campagnolo or similar
derailleur.
Simplex ends are not threaded but can be reworked to take a
standard derailleur quickly and cheaply by brazing in a
threaded insert and cutting away theh back edge.
AFAIK there is no forged end with an incompatible thread.

Jay Beattie said:

Is there anything that needs to be done to a 1010B
dropout/derailleur hanger to get it to work right with a modern
Japanese derailleur. I know mine is straight (I have a
derailleur hanger tool), but my Ultegra derailleur/STI does not
seem to shift down well on my '79/'80 steel frame. I was
wondering if the drop were off or something to do with B
adjustment.

Maybe.
For proer SIS response, Shimano specifies a distance from
axle center to upper pivot center and an angle for the stop
tab. In the years before that specification, builders
brazed ends in at any arty angle they thought looked nice. A
1010B is about the right dimensions:

http://www.yellowjersey.org/sisend.html

--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971