Ultegra triple chainring question

Harry Hellerman said:

I am considering changing out my original equipped Ultegra
triple's 52-42-30 chainrings with TA's 48-38-24.

huh. that's exactly what i did.

Quoted message said:

Will I need to take out chain links for this 4 tooth
(outer ring) change?

i did. you may as well, it'll make a few more of the
small/small gears usable by reducing the amount of chain the
derailleur has to take up.

Quoted message said:

Also, will I need to lower the front derailleur?

maybe a tad, but in fact i had to leave the f/d visibly high
to shift well.

Quoted message said:

I'm thinking that 4 teeth shouldn't make enough difference
to warrant these changes..

why not? it's less hassle than what you're already doing.
--
david reuteler [email hidden]

Quoted message said:

I am considering changing out my original equipped Ultegra
triple's 52-42-30 chainrings with TA's 48-38-24.

Quoted message said:

I'm thinking that 4 teeth shouldn't make enough difference
to warrant these changes.. Any thoughts?

The shift in gear-inches will be:

7.7% in the big ring

8.5% in the middle ring

20% in the little ring

Sound significant to me.

Chris Neary [email hidden]

"Science, freedom, beauty, adventure: what more could you
ask of life? Bicycling combined all the elements I loved" -
Adapted from a quotation by Charles Lindbergh

Quoted message said:

I am considering changing out my original equipped Ultegra
triple's

52-42-30

Quoted message said:

chainrings with TA's 48-38-24.

Will I need to take out chain links for this 4 tooth
(outer ring) change? Also, will I need to lower the front
derailleur? I'm thinking that 4 teeth shouldn't make
enough difference to warrant

these

Quoted message said:

changes.. Any thoughts?

You'll definitely benefit from lowering the front
derailleur, but even so, your shifting won't be as good as
it was originally. Your Shimano Ultegra derailleur was
designed to work with the radius of a 52t chainring, so the
tail end of it will be sitting further above the chainring
than is optimal. Where this is likely to show up most is in
shifting off the middle chainring onto the smallest one.
Fortunately, you're sticking with the normal 10-tooth
difference between the two larger chainrings; increasing
that difference has a more dramatic effect on reducing
performance.

As for removing chain links, that depends upon how things
are presently set up. Often people have chains a bit shorter
than they should be, in which case things might be perfect
with the reduced demands of a smaller large chainring. But
if things are basically correct with the stock
configuration, you should benefit from removing a few links
(probably 4 half-links).

--Mike-- Chain Reaction Bicycles www.ChainReaction.com

"Harry Hellerman" <[email hidden]> wrote in
message "]news:[email hidden]...

Quoted message said:

Hi all, I am considering changing out my original equipped
Ultegra triple's

52-42-30

Quoted message said:

chainrings with TA's 48-38-24.

Will I need to take out chain links for this 4 tooth
(outer ring) change? Also, will I need to lower the front
derailleur? I'm thinking that 4 teeth shouldn't make
enough difference to warrant

these

Quoted message said:

changes.. Any thoughts? Thanks, Harry

David Reuteler said:

Quoted message said:

I am considering changing out my original equipped
Ultegra triple's 52-42-30 chainrings with TA's 48-38-24.

huh. that's exactly what i did.

I've also had that idea for quite some time. I'd like to
hear a bit more about your setup; could you provide some
details about your components? Do you find shifting to be
less smooth than before?

--
Frederic Briere <*> [email hidden]

=> <[email hidden]> IS NO MORE:
=> <http://www.abacomsucks.com> <=

"Frederic Briere" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

David Reuteler said:

Quoted message said:

I am considering changing out my original equipped
Ultegra triple's

52-42-30

Quoted message said:

Quoted message said:

Quoted message said:

chainrings with TA's 48-38-24.

huh. that's exactly what i did.

I've also had that idea for quite some time. I'd like to
hear a bit more about your setup; could you provide some
details about your components? Do you find shifting to be
less smooth than before?

Last season I changed my Ultegra triple to a TAs 50-40-28
and I am very satisfied. Shifting is not quite as smooth as
with the Ultegra, but only barely noticeably so and is still
quite satisfactory.

I am happy I made the change and would do so again.

Regards, Mish

Frederic Briere said:

I've also had that idea for quite some time. I'd like to
hear a bit more about your setup; could you provide some
details about your components? Do you find shifting to be
less smooth than before?

yea, it's definitely less quick/smooth than before
especially between the 24 and 38 (i put on a chain catcher,
i'd highly recommend that). that said, it's not that bad,
it's definitely acceptable and i'd certainly do it again.
hell, i rode it like this for about 9,000 miles. the drive-
train was mostly 2002 shimano ultegra (the only exceptions
were a respaced xt hub and an sram chain) with a 11-32 or
12-27 cassette. the former esp left a few gears on the
small/small combo you couldn't use (you're exceeding the
capacity of the
r/d) but no big deal.

i'd blame the difference on the front derailleur being
shaped for the 42/52 combo .. when my ultegra brifter broke
i upgraded the brifters and r/d to 9sp campag (i didn't find
the shifting w/ the hybrid setup to be all that good, so i
built up a campag wheel). sooo... with the campag brifters i
could probably find a f/d built for smaller rings and get
great shifting out of it. but i don't believe that's an
option for the shimano brifters.
--
david reuteler [email hidden]

Quoted message said:

Hi all, I am considering changing out my original equipped
Ultegra triple's 52-42-30 chainrings with TA's 48-38-24.

What does TA refer to?

Pbwalther said:

Quoted message said:

I am considering changing out my original equipped
Ultegra triple's 52-42-30 chainrings with TA's 48-38-24.

What does TA refer to?

T.A. is a brand:

blackbirdsf.orgtaOpen ↗

--
terry morse Palo Alto, CA bike.terrymorse.combike.terrymorse.comOpen ↗