Campy compact crank-is it convertable?

Dans le message de
news:[email hidden],
[email hidden] <[email hidden]> a réfléchi, et puis a déclaré :

Quoted message said:

After riding a triple for several months, I'm starting to think I
might do just as well with a double. Currently, I've been riding a
Campy Racing T crankset with 52-42-30 chainrings. In the back, it's a
Dura-Ace 12-23.
Since I put these parts on my new frame, I find I never use the 30
tooth chainring, even going up Tucson's Mt Lemmon.
This leads me to believe I'd do okay with a 53-39 up front. If I went
to a 12-25 cassette in the rear, I really be set for most southern AZ
climbing. (Of course, I'd still keep the triple for trips to
Colorado.) So here's the question: if I switched to a Campy Centaur
compact crank, will I have the ability to switch between a 50x34
compact set up and "standard" 53x39 gearing if I was so inclined?
Imagine the possibilities, one bottom bracket, one crank, two
different sets pf chainrings.

Thanks

I'm going to bet that the cost of two rings won't be that much smaller than
a second crank, and you only have to remove one bolt to make the change.
Assuming, of course, that the gearing combinations don't give you a too
slack or too tight chain.

But if you want rings, TA makes them from 33 to 61 for 110mm compacts.
--
Bonne route !

Sandy
Verneuil-sur-Seine FR

Quoted message said:

So here's the question: if I switched to a Campy Centaur compact crank,
will I have the ability to switch between a 50x34 compact set up and
"standard" 53x39 gearing if I was so inclined?

Sure, but you'll have to move the front der. up & down with each
switch. Just leave the 34/50 up front and swap the rear cassette when
you need higher or lower gears. A 34x25 is low like 39x29, and a 50x11
is taller than 53x12. If you have a Shimano back end, a 12-27 will get
you up the CO cols, and an 11-23 may work for everything
else......Ain't compacts neat? Cheers.
Jim

Sandy said:

Dans le message de
news:[email hidden],
[email hidden] <[email hidden]> a réfléchi, et puis a déclaré :

Quoted message said:

After riding a triple for several months, I'm starting to think I
might do just as well with a double. Currently, I've been riding a
Campy Racing T crankset with 52-42-30 chainrings. In the back, it's a
Dura-Ace 12-23.
Since I put these parts on my new frame, I find I never use the 30
tooth chainring, even going up Tucson's Mt Lemmon.
This leads me to believe I'd do okay with a 53-39 up front. If I went
to a 12-25 cassette in the rear, I really be set for most southern AZ
climbing. (Of course, I'd still keep the triple for trips to
Colorado.) So here's the question: if I switched to a Campy Centaur
compact crank, will I have the ability to switch between a 50x34
compact set up and "standard" 53x39 gearing if I was so inclined?
Imagine the possibilities, one bottom bracket, one crank, two
different sets pf chainrings.

Thanks

I'm going to bet that the cost of two rings won't be that much smaller than
a second crank, and you only have to remove one bolt to make the change.
Assuming, of course, that the gearing combinations don't give you a too
slack or too tight chain.

2 TA rings are a 'little' less expensive than a new crank.

Quoted message said:

But if you want rings, TA makes them from 33 to 61 for 110mm compacts.
--
Bonne route !

Sandy
Verneuil-sur-Seine FR

Sandy said:

Dans le message de
news:[email hidden],
[email hidden] <[email hidden]> a réfléchi, et puis a déclaré :

Quoted message said:

After riding a triple for several months, I'm starting to think I
might do just as well with a double. Currently, I've been riding a
Campy Racing T crankset with 52-42-30 chainrings. In the back, it's a
Dura-Ace 12-23.
Since I put these parts on my new frame, I find I never use the 30
tooth chainring, even going up Tucson's Mt Lemmon.
This leads me to believe I'd do okay with a 53-39 up front. If I went
to a 12-25 cassette in the rear, I really be set for most southern AZ
climbing. (Of course, I'd still keep the triple for trips to
Colorado.) So here's the question: if I switched to a Campy Centaur
compact crank, will I have the ability to switch between a 50x34
compact set up and "standard" 53x39 gearing if I was so inclined?
Imagine the possibilities, one bottom bracket, one crank, two
different sets pf chainrings.

Thanks

I'm going to bet that the cost of two rings won't be that much smaller than
a second crank,

Depends on the rings. You can get really cheap 110mm bcd rings from
Nashbar/Stronglight, Sugino, etc. Much cheaper than one TA ring or a
crankset. Not sure if others make 39 tooth rings in 110mm bcd. Might
have to choose between a 38 or 40.

Quoted message said:

and you only have to remove one bolt to make the change.

Or you can order a Centaur 110mm bcd crank with 50-34 rings from
TotalCycling in Ireland for about $91, plus shipping. Get some other
stuff and spread the shipping cost. Much cheaper than a pair of TA
rings. Much cheaper.

http://www.totalcycling.com/ProductDetails/mcs/productID/1017/groupID/2/categoryID/40/v/e26f043e-1054-4f07-b5a1-0e01077c4535

Quoted message said:

Assuming, of course, that the gearing combinations don't give you a too
slack or too tight chain.

But if you want rings, TA makes them from 33 to 61 for 110mm compacts.
--
Bonne route !

Sandy
Verneuil-sur-Seine FR

[email hidden] wrote:

----snip----

Quoted message said:

Depends on the rings. You can get really cheap 110mm bcd rings from
Nashbar/Stronglight, Sugino, etc. Much cheaper than one TA ring or a
crankset. Not sure if others make 39 tooth rings in 110mm bcd. Might
have to choose between a 38 or 40.

----/snip----

I thought that Campy compact rings used a propriatary bolt circle (the
bolt hole inline with the crank arm was somehow offset).

SYJ

Dans le message de
news:[email hidden],
[email hidden] <[email hidden]> a réfléchi, et puis a
déclaré :

Quoted message said:

Sandy said:

Dans le message de
news:[email hidden],
[email hidden] <[email hidden]> a réfléchi, et puis a
déclaré :

Quoted message said:

After riding a triple for several months, I'm starting to think I
might do just as well with a double. Currently, I've been riding a
Campy Racing T crankset with 52-42-30 chainrings. In the back, it's
a Dura-Ace 12-23.
Since I put these parts on my new frame, I find I never use the 30
tooth chainring, even going up Tucson's Mt Lemmon.
This leads me to believe I'd do okay with a 53-39 up front. If I
went to a 12-25 cassette in the rear, I really be set for most
southern AZ climbing. (Of course, I'd still keep the triple for
trips to Colorado.) So here's the question: if I switched to a
Campy Centaur compact crank, will I have the ability to switch
between a 50x34 compact set up and "standard" 53x39 gearing if I
was so inclined? Imagine the possibilities, one bottom bracket, one
crank, two different sets pf chainrings.

Thanks

I'm going to bet that the cost of two rings won't be that much
smaller than a second crank,

Depends on the rings. You can get really cheap 110mm bcd rings from
Nashbar/Stronglight, Sugino, etc. Much cheaper than one TA ring or a
crankset. Not sure if others make 39 tooth rings in 110mm bcd. Might
have to choose between a 38 or 40.

Then he doesn't have to start with a "costly" Centaur ! Cheap rings ?
Around me, not you, a pair of TA rings in 110 goes for around 65-70?,
depending on the teeth. A Centaur crankset is around 90?. No, not
identical, but with the advantages of

Quoted message said:

Quoted message said:

you only have to remove one bolt to make the change.

That's one bolt, since there's no need to change the left side. Maybe even
sell of that piece and make the price difference closer.

Or not. Options are cool to have.
--
Sandy

The above is guaranteed 100% free of sarcasm,
denigration, snotty remarks, indifference, platitudes, fuming demands that
"you do the math", conceited visions of a better world on wheels according
to [insert NAME here].

SYJ said:

[email hidden] wrote:

----snip----

Quoted message said:

Depends on the rings. You can get really cheap 110mm bcd rings from
Nashbar/Stronglight, Sugino, etc. Much cheaper than one TA ring or a
crankset. Not sure if others make 39 tooth rings in 110mm bcd. Might
have to choose between a 38 or 40.

----/snip----

I thought that Campy compact rings used a propriatary bolt circle (the
bolt hole inline with the crank arm was somehow offset).

ONLY THE CARBON CAMPAGNOLO COMPACT CRANKSETS HAVE THE ODD 110/112 MM
BCD CHAINRINGS. The aluminum Centaur and Veloce and Mirage, yes all
three groups have a 110mm bcd crankset, compact cranksets all use
stanard off the shelf 110 mm bcd chainrings. The ones that use the odd
110/112 mm bcd are the ones with the hidden spider arm on the backside
of the crank arm. All of the standard looking 5 arm spider cranksets
use 110mm bcd chainrings.

Quoted message said:

SYJ

Quoted message said:

SYJ said:

[email hidden] wrote:

----snip----

Quoted message said:

Depends on the rings. You can get really cheap 110mm bcd rings from
Nashbar/Stronglight, Sugino, etc. Much cheaper than one TA ring or a
crankset. Not sure if others make 39 tooth rings in 110mm bcd. Might
have to choose between a 38 or 40.

----/snip----

I thought that Campy compact rings used a propriatary bolt circle (the
bolt hole inline with the crank arm was somehow offset).

ONLY THE CARBON CAMPAGNOLO COMPACT CRANKSETS HAVE THE ODD 110/112 MM
BCD CHAINRINGS. The aluminum Centaur and Veloce and Mirage, yes all
three groups have a 110mm bcd crankset, compact cranksets all use
stanard off the shelf 110 mm bcd chainrings. The ones that use the odd
110/112 mm bcd are the ones with the hidden spider arm on the backside
of the crank arm. All of the standard looking 5 arm spider cranksets
use 110mm bcd chainrings.

Thanks for clearing that up! I had thought Campy had lost their
collective minds!

Mark

SYJ said:

[email hidden] wrote:

----snip----

Quoted message said:

Depends on the rings. You can get really cheap 110mm bcd rings from
Nashbar/Stronglight, Sugino, etc. Much cheaper than one TA ring or a
crankset. Not sure if others make 39 tooth rings in 110mm bcd. Might
have to choose between a 38 or 40.

----/snip----

I thought that Campy compact rings used a propriatary bolt circle (the
bolt hole inline with the crank arm was somehow offset).

SYJ

They are for the carbon compact cranks with thw hidden spider. For
Centaur and Veloce aluminum, they are a 110, non hidden spider.

Mark Janeba said:

Quoted message said:

SYJ said:

[email hidden] wrote:

----snip----

>Depends on the rings. You can get really cheap 110mm bcd rings from
>Nashbar/Stronglight, Sugino, etc. Much cheaper than one TA ring or a
>crankset. Not sure if others make 39 tooth rings in 110mm bcd. Might
>have to choose between a 38 or 40.

----/snip----

I thought that Campy compact rings used a propriatary bolt circle (the
bolt hole inline with the crank arm was somehow offset).

ONLY THE CARBON CAMPAGNOLO COMPACT CRANKSETS HAVE THE ODD 110/112 MM
BCD CHAINRINGS. The aluminum Centaur and Veloce and Mirage, yes all
three groups have a 110mm bcd crankset, compact cranksets all use
stanard off the shelf 110 mm bcd chainrings. The ones that use the odd
110/112 mm bcd are the ones with the hidden spider arm on the backside
of the crank arm. All of the standard looking 5 arm spider cranksets
use 110mm bcd chainrings.

Thanks for clearing that up! I had thought Campy had lost their
collective minds!

Mark

I think Campagnolo did have a bit too much vino before thinking up
their odd 112/110 mm bcd carbon cranksets.

But you can pretty easily make any 110 mm bcd chainring fit the 112/110
mm bcd configuration. Just grind/file away 2 mm of aluminum from the
chainring hole that goes on the back of the crankarm. Its hidden so no
one will see it. And its only 1 of 5 so their is no danger of anything
failing. And chainrings are aluminum, so any round file or Dremel burr
or grinding stone in a drill will remove the little bit of aluminum.
You don't have to indent the bolt hole on the chainring since its on
the inside and the chain does not go there. Might want a slightly
longer bolt for the modified hole. 5 minutes of work and a regular
110mm bcd chainring will fit the 112/110 configuration. So there is no
need to be scared away by the unique bolt pattern.

Quoted message said:

Mark Janeba said:

Quoted message said:

ONLY THE CARBON CAMPAGNOLO COMPACT CRANKSETS HAVE THE ODD 110/112 MM
BCD CHAINRINGS. The aluminum Centaur and Veloce and Mirage, yes all
three groups have a 110mm bcd crankset, compact cranksets all use
stanard off the shelf 110 mm bcd chainrings. The ones that use the odd
110/112 mm bcd are the ones with the hidden spider arm on the backside
of the crank arm. All of the standard looking 5 arm spider cranksets
use 110mm bcd chainrings.

Nothing that 5 minutes with a $20 kmart dremel won't fix. At least
they made it 112 bcd rather than 105 or something that a dremel
couldn't fix. I guess they were thinking of the budget racer who buys
$10 sugino rings and has the $20 kmart dremel in his garage.

Sometimes, Campagnolo's arrogance is beyond belief. For example, when
I lost the M3 bolt on my record derailleur, and campy wanted $85 for a
replacement bolt.

- Don Gillies
San Diego, CA

Dans le message de news:[email hidden],
Donald Gillies <[email hidden]> a réfléchi, et puis a déclaré :

Quoted message said:

Quoted message said:

Mark Janeba said:

[email hidden] wrote:
>
> ONLY THE CARBON CAMPAGNOLO COMPACT CRANKSETS HAVE THE ODD 110/112
> MM BCD CHAINRINGS. The aluminum Centaur and Veloce and Mirage,
> yes all three groups have a 110mm bcd crankset, compact cranksets
> all use stanard off the shelf 110 mm bcd chainrings. The ones
> that use the odd 110/112 mm bcd are the ones with the hidden
> spider arm on the backside of the crank arm. All of the standard
> looking 5 arm spider cranksets use 110mm bcd chainrings.

Nothing that 5 minutes with a $20 kmart dremel won't fix. At least
they made it 112 bcd rather than 105 or something that a dremel
couldn't fix. I guess they were thinking of the budget racer who buys
$10 sugino rings and has the $20 kmart dremel in his garage.

Sometimes, Campagnolo's arrogance is beyond belief. For example, when
I lost the M3 bolt on my record derailleur, and campy wanted $85 for a
replacement bolt.

- Don Gillies
San Diego, CA

It's certainly not Campa.
Here's their VAT included price (euros) :
RD-RE307 vite corpo inferiore 35,88

You can find their maximum retail prices (like this one) at :
http://www.campagnolo.com/prices_s.php?p=2

--
Bonne route !

Sandy
Verneuil-sur-Seine FR