replace the 12 cog on a 12/25 with an 11 cog ? ? ?? ? ? ?

is it ok to replace the 12 cog on a 12/25 with an 11 cog making an 11-13-14-15-17-19-21-23-25?

shimano 9 speed, dura ace...woul dit shift weird or something? need some kind of different lock
ring, etc..????

thanks!

 

You will need to get an 11t lockring for use with the 11t cog. I've done something similar. But I
dropped the 14 for 11-12-13-15-17-19-21-23-25. I done it for 2 DA 9 speed cassettes & have had
absolutely no problems. It provides for the smallest ratio jump. No problems shifting. But on
occassion wish I had the 14 for a tighter shift when I'm on flatter stuff.( Really want a 10 speed
with 11-25. When I'm only on flat stuff just use the 11-23. I've also used the 12-23 for winter
riding.) I ride the hills alot & like the 11 for the long downhills. Why do you want the 11 without
the 12? You will find yourself in the 12 much more than the 11 & mainly the 13-15.

You will hear I'm sure from several who will tell you & make judgements etc "you don't" need the 11
etc. And in theory ones doesn't but for my use with 650 wheels I've really been happy.

Barbara L

"resind" <[email protected]> wrote in message news:030520032119589369%[email protected]...
> is it ok to replace the 12 cog on a 12/25 with an 11 cog making an 11-13-14-15-17-19-21-23-25?
>
> shimano 9 speed, dura ace...woul dit shift weird or something? need some kind of different lock
> ring, etc..????
>
> thanks!

 

"resind" <[email protected]> wrote in message news:030520032119589369%[email protected]...
> is it ok to replace the 12 cog on a 12/25 with an 11 cog making an 11-13-14-15-17-19-21-23-25?
>
> shimano 9 speed, dura ace...woul dit shift weird or something? need some kind of different lock
> ring, etc..????
>

The jump from 13 to 11 is huge.

 

"one of the six billion" <[email protected]> wrote in message
news:[email protected]...
>
> "resind" <[email protected]> wrote in message news:030520032119589369%[email protected]...
> > is it ok to replace the 12 cog on a 12/25 with an 11 cog making an 11-13-14-15-17-19-21-23-25?
> >
> > shimano 9 speed, dura ace...woul dit shift weird or something? need some kind of different lock
> > ring, etc..????
> >
>
> The jump from 13 to 11 is huge.
>
Yeah, but how often are you really in the 11t? or even 12t for that matter? Downhills and sprints.

Mike

 

resind-<< is it ok to replace the 12 cog on a 12/25 with an 11 cog making an
11-13-14-15-17-19-21-23-25?

Shift from the 11t to the 13t may not work well or at all...may have to shift up to the 14, down to
the 13, to get the 13. Also need a smaller 11t lockring.

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

 

On Sun, 04 May 2003 00:53:40 -0400, Barbara Larrain wrote:

> You will hear I'm sure from several who will tell you & make judgements etc "you don't" need the
> 11 etc. And in theory ones doesn't but for my use with 650 wheels I've really been happy.

The wheel diameter makes a huge difference. With a 32-369 (17x1 1/4 Moulton) a 56x11 = about an 86"
gear. Even a 10T only brings you up to the mid-90s.

 

> resind-<< is it ok to replace the 12 cog on a 12/25 with an 11 cog making an
> 11-13-14-15-17-19-21-23-25?

A usually reliable source wrote.

> Shift from the 11t to the 13t may not work well or at all...

Jeez, it's only a measly two-tooth jump, why wouldn't it shift well?

> may have to shift up to the 14, down to the 13, to get the 13. Also need a smaller 11t lockring.

Got it backwards (or maybe upside down!) from the 11 to the 14 is a _down_ shift, from 14 to 13 is
an _up_shift.

The 11-13 jump is pretty big to have on the high end. I'd be more inclined to ditch the 14 rather
than the 12.

See: http://sheldonbrown.com/gear-theory.html#progression

Sheldon "Wide On The Bottom, Narrow On Top" Brown +------------------------------------------+
| So we'll go no more a roving |
| So late into the night, |
| Though the heart be still as loving, |
| And the moon be still as bright. |
| |
| For the sword outwears its sheath, |
| And the soul wears out the breast, |
| And the heart must pause to breathe, |
| And Love itself have rest. |
| |
| Though the night was made for loving, | And the day returns too soon, | Yet we'll go no more a
| roving | By the light of the moon. | --Lord Byron |
+------------------------------------------+ Harris Cyclery, West Newton, Massachusetts Phone
617-244-9772 FAX 617-244-1041 http://harriscyclery.com Hard-to-find parts shipped Worldwide
http://captainbike.com http://sheldonbrown.com

 

thanks...i will try the 11-25 by dropping the 14....

i am aware that i should be spinning more, i am aware that c boardman said theres no need for an
11....im also a cat 2 (i know, big deal)...and like to pop my shifters all the way up to the 11
sometimes, but also like 23/25 for climbing....

thanks

In article <030520032119589369%[email protected]>, resind <[email protected]> wrote:

> is it ok to replace the 12 cog on a 12/25 with an 11 cog making an 11-13-14-15-17-19-21-23-25?
>
> shimano 9 speed, dura ace...woul dit shift weird or something? need some kind of different lock
> ring, etc..????
>
> thanks!

 

[email protected] (Qui si parla Campagnolo) wrote in message
news:<[email protected]>...

>
> << The 11-13 jump is pretty big to have on the high end. I'd be more inclined to ditch the 14
> rather than the 12.
>
>
> me too, I always ask the person would they rather have the 14 or the 11, which will they use more.
>
>
> Peter Chisholm Vecchio's Bicicletteria

Maybe which one they will use more is not the question. On our club ride, if I didn't have an 11, I
might get dropped on the downhill sprint on Highway 84 into La Honda. At best I'd just be sitting on
and spinning. I use a 11-25.

Bob Parker

 

On Sun, 04 May 2003 04:19:19 GMT, resind <[email protected]> wrote:

>s it ok to replace the 12 cog on a 12/25 with an 11 cog making an 11-13-14-15-17-19-21-23-25?

The 11 sits into the 12 and not the 13. You need 11,12,14.

 

> "resind" <[email protected]> wrote in message news:030520032119589369%[email protected]...
> > is it ok to replace the 12 cog on a 12/25 with an 11 cog making an 11-13-14-15-17-19-21-23-25?
> >
> > shimano 9 speed, dura ace...woul dit shift weird or something? need some kind of different lock
> > ring, etc..????
> >
>
"one of the six billion" <[email protected]> replied
> The jump from 13 to 11 is huge.

Another aspect not yet covered: there are hubs compatible with the 11-tooth cog and there are some
which aren't. See Sheldon Brown's page on cassette for details at
http://www.sheldonbrown.com/k7.html Basically, the 11-tooth-compatible hubs are not splined until
the end to allow for the small cog.

Regarding the "huge" jump at the upper end, it depends on how you see it. I have done simething
similar with a custom cassette: 12-14-15-16-17-19-21-25-32. My idea: I always use the cogs between
14 and 21, so the gap between 12 and 14 becomes significant only in a 1% downhill or if I have a
strong wind in my back. I have no problem shifting from 12 to 14, but I shift in friction.

So if the original poster rarely uses his (her?) cog smaller than 13, than it's an OK gap. But if
the poster wants to use it often, than a 12 would be better suited.

Regards,

Michel Gagnon