Serotta Legend Ti w/DuraAce triple?

Dave Thompson wrote:

It sounds like an adjustment issue, though the downshift from the middle to
the inner ring requires more pressure on the lever than the same shift on my
Ultegra equipped bikes. I have no chain rub except in extreme cross-chain
configurations, which I never purposefuly do. With the front der properly
adjusted, there's plenty of trim.

Dave,

Do you use middle ring, largest cog, or do you regard that as an
extreme cross-chain configuration? And if you do use it, do you get
chainrub?

I often want to use that combo, so as not to have to shift the
front-side down to the inner ring as much. I fully appreciate that the
combination of inner ring/outermost cogs is bad, and that outer
ring/innermost cogs is bad. I've always wondered, though, about the
middle ring. I'm willing to give up middle ring/outermost cog.

Dave

"Dave Stallard" wrote in message
...
Dave Thompson wrote:

It sounds like an adjustment issue, though the downshift from the middle
to
the inner ring requires more pressure on the lever than the same shift
on my
Ultegra equipped bikes. I have no chain rub except in extreme
cross-chain
configurations, which I never purposefuly do. With the front der
properly
adjusted, there's plenty of trim.

Dave,

Do you use middle ring, largest cog, or do you regard that as an
extreme cross-chain configuration? And if you do use it, do you get
chainrub?

I often want to use that combo, so as not to have to shift the
front-side down to the inner ring as much. I fully appreciate that the
combination of inner ring/outermost cogs is bad, and that outer
ring/innermost cogs is bad. I've always wondered, though, about the
middle ring. I'm willing to give up middle ring/outermost cog.

Dave

I typically don't use the middle ring with smallest/largest cog combos,
though I have on rare occassions. Particularly the middle/small, in which
there is no rub. Some rub problems occur due to chainstay length. Short
chainstays allow for a larger angle of departure from the chainrings to the
cogs than a longer chainstay. The stays on my Serotta are 42cm and on the
Kirk 42.5cm. I shift gears as needed while trying to keep a good chainline.
The larger the angle of the chain off the chainrings, the more wear and tear
on the rings and chain, so being the cheapguy that I am, I try to be kind to
those things.

I wonder if your front derailleur is set parallel to the chainrings. If not,
chainrub would more easily occur (rubbing on the tail or head of the
derailleur depending on the angle of the derailleur) Can you set your bike
in a stand and observe where and when the rubbing occurs? Have you had
everything checked by someone who is proficient at doing the adjustments?
I'm no ace mechanic, but I've not had too much of a problem setting my bikes
up correctly. (I'm not trying to sound condescending) I can remember when
the DA triple first came out, there seemed to be talk of problems setting it
up correctly, but I set mine up just like the Ultegra running gear I had
previously and it seems to be just fine. I've had the DA triple on the Kirk
since June of last year, and the Serotta has abount 800 miles on its DA
triple components.

Dave

"Dave Stallard" wrote in message
...
Dave Thompson wrote:

It sounds like an adjustment issue, though the downshift from the middle
to
the inner ring requires more pressure on the lever than the same shift
on my
Ultegra equipped bikes. I have no chain rub except in extreme
cross-chain
configurations, which I never purposefuly do. With the front der
properly
adjusted, there's plenty of trim.

Dave,

Do you use middle ring, largest cog, or do you regard that as an
extreme cross-chain configuration? And if you do use it, do you get
chainrub?

I often want to use that combo, so as not to have to shift the
front-side down to the inner ring as much. I fully appreciate that the
combination of inner ring/outermost cogs is bad, and that outer
ring/innermost cogs is bad. I've always wondered, though, about the
middle ring. I'm willing to give up middle ring/outermost cog.

Dave

I typically don't use the middle ring with smallest/largest cog combos,
though I have on rare occassions. Particularly the middle/small, in which
there is no rub. Some rub problems occur due to chainstay length. Short
chainstays allow for a larger angle of departure from the chainrings to the
cogs than a longer chainstay. The stays on my Serotta are 42cm and on the
Kirk 42.5cm. I shift gears as needed while trying to keep a good chainline.
The larger the angle of the chain off the chainrings, the more wear and tear
on the rings and chain, so being the cheapguy that I am, I try to be kind to
those things.

I wonder if your front derailleur is set parallel to the chainrings. If not,
chainrub would more easily occur (rubbing on the tail or head of the
derailleur depending on the angle of the derailleur) Can you set your bike
in a stand and observe where and when the rubbing occurs? Have you had
everything checked by someone who is proficient at doing the adjustments?
I'm no ace mechanic, but I've not had too much of a problem setting my bikes
up correctly. (I'm not trying to sound condescending) I can remember when
the DA triple first came out, there seemed to be talk of problems setting it
up correctly, but I set mine up just like the Ultegra running gear I had
previously and it seems to be just fine. I've had the DA triple on the Kirk
since June of last year, and the Serotta has abount 800 miles on its DA
triple components.

Dave

On Wed, 25 Aug 2004 23:08:16 -0400, Dave Stallard
wrote:

Dave Thompson wrote:

It sounds like an adjustment issue, though the downshift from the middle to
the inner ring requires more pressure on the lever than the same shift on my
Ultegra equipped bikes. I have no chain rub except in extreme cross-chain
configurations, which I never purposefuly do. With the front der properly
adjusted, there's plenty of trim.

Dave,

Do you use middle ring, largest cog, or do you regard that as an
extreme cross-chain configuration? And if you do use it, do you get
chainrub?

I often want to use that combo, so as not to have to shift the
front-side down to the inner ring as much. I fully appreciate that the
combination of inner ring/outermost cogs is bad, and that outer
ring/innermost cogs is bad. I've always wondered, though, about the
middle ring. I'm willing to give up middle ring/outermost cog.

Dave

Hi, I use the middle ring large cog on my DA triple. But I don't use
the small ring with the middle ring. It is just the way I have it set
up. I think that you can adjust it to be rub free on one end or the
other, but not both. Of course the pros may be able to do both.


Life is Good!
Jeff

On Wed, 25 Aug 2004 23:08:16 -0400, Dave Stallard
wrote:

Dave Thompson wrote:

It sounds like an adjustment issue, though the downshift from the middle to
the inner ring requires more pressure on the lever than the same shift on my
Ultegra equipped bikes. I have no chain rub except in extreme cross-chain
configurations, which I never purposefuly do. With the front der properly
adjusted, there's plenty of trim.

Dave,

Do you use middle ring, largest cog, or do you regard that as an
extreme cross-chain configuration? And if you do use it, do you get
chainrub?

I often want to use that combo, so as not to have to shift the
front-side down to the inner ring as much. I fully appreciate that the
combination of inner ring/outermost cogs is bad, and that outer
ring/innermost cogs is bad. I've always wondered, though, about the
middle ring. I'm willing to give up middle ring/outermost cog.

Dave

Hi, I use the middle ring large cog on my DA triple. But I don't use
the small ring with the middle ring. It is just the way I have it set
up. I think that you can adjust it to be rub free on one end or the
other, but not both. Of course the pros may be able to do both.


Life is Good!
Jeff