12-27 vs 12-25

I currently have an 11-23 on my Ultegra double and need more range. Should I go for the 12-27, or
are there shifting issues, etc., that would steer me toward the 12-25. I can ride the 23, but have
developed some "over-use" type injuries from riding the hills around here.

Thanks.

12-27 shifts perfect and it gives you a bailout gear, plus unless you are pretty strong its not that
often you need more than a 12. Chris "Donald Specker" <donald.specker@verizon.net> wrote in message
news:P_QTa.23482$0F4.2695@nwrdny02.gnilink.net...
> I currently have an 11-23 on my Ultegra double and need more range.
Should
> I go for the 12-27, or are there shifting issues, etc., that would steer
me
> toward the 12-25. I can ride the 23, but have developed some "over-use" type injuries from riding
> the hills around here.
>
> Thanks.

dorn <xdoxrnx@one.net> wrote:
: 12-27 shifts perfect and it gives you a bailout gear, plus unless you are pretty strong its not
: that often you need more than a 12.

In fact, why not go 13/25 which would go you a nice close range? If you've got a 52 or 53 big ring
you don't need the 12 anyway.

Annoying Shimano don't offer a 13/27 which would probably be perfect for your needs.

Arthur

Arthur Clune wrote:
>
> dorn <xdoxrnx@one.net> wrote:
> : 12-27 shifts perfect and it gives you a bailout gear, plus unless you are pretty strong its not
> : that often you need more than a 12.
>
> In fact, why not go 13/25 which would go you a nice close range? If you've got a 52 or 53 big ring
> you don't need the 12 anyway.

How would you know and what does "need" mean anyway?

> Annoying Shimano don't offer a 13/27 which would probably be perfect for your needs.

That's the one thing I hate about the aligned cog/cassette system -- not as much freedom to mess
around if you are a gear head. We simply get what "someone else" decided was a good idea.
Fortunately some tricks can be played if one is clever and has a few extra bucks.

On Thu, 24 Jul 2003 13:16:31 GMT, "Donald Specker" <donald.specker@verizon.net> wrote:

>I currently have an 11-23 on my Ultegra double and need more range. Should I go for the 12-27, or
>are there shifting issues, etc., that would steer me toward the 12-25. I can ride the 23, but have
>developed some "over-use" type injuries from riding the hills around here.
>
>Thanks.
>

In the world of recreational bicyclists, there is little difference in Shimano's 12/25 and 12/27.
21,23,25 vs 21,24,27 I'd opt for the 27. A 13/25 is made in Ultegra and 13/26 in 105 and those
really my favorites in Shimano.

Should you want to save $, just take the 11 off your 11/23 and add a spacer and 26.

[posted to rec.bicycles.tech and mailed to Paul Kopit
<p.kopit@verizon.net>]

>Should you want to save $, just take the 11 off your 11/23 and add a spacer and 26.

The smallest cog is special. You'd need to get a replacement for it.

<< >I currently have an 11-23 on my Ultegra double and need more range. Should
>I go for the 12-27, or are there shifting issues, etc., that would steer me toward the 12-25. I can
>ride the 23, but have developed some "over-use" type injuries from riding the hills around here.

Should you want to save $, just take the 11 off your 11/23 and add a spacer and 26 >>

For this to work, you'll also need a diferent (larger diameter) lockring and 12 or 13T first
position cog, which is knurled to mate with the lockring.

"Donald Specker" <donald.specker@verizon.net> wrote ...
> I currently have an 11-23 on my Ultegra double and need more range. Should I go for the 12-27, or
> are there shifting issues, etc., that would steer me toward the 12-25. I can ride the 23, but have
> developed some "over-use" type injuries from riding the hills around here.

I went to 12-27 Ultegra a few years ago for the extra gear (actually I went from 8 speed Ultegra
12-23 or 24 to 9 speed Dura Ace 12-27). I have no shifting issues at all. I can crank the 12 to 35
mph downhill; I can't imagine needing an 11.

Michael

> The smallest cog is special. You'd need to get a replacement for it.

The 12 of the 11-23 I have in front of me is identical to the 12 of the 12-25. I believe all 12t
Shimano sprockets will work in the first position. You do need to use the correct lockring though.

James Thomson

Michael wrote:
> I went to 12-27 Ultegra a few years ago for the extra gear (actually I went from 8 speed Ultegra
> 12-23 or 24 to 9 speed Dura Ace 12-27). I have no shifting issues at all. I can crank the 12 to 35
> mph downhill; I can't imagine needing an 11.

How about if your largest front cog is a 46?

--Bill Davidson
--
Please remove ".nospam" from my address for email replies.

I'm a 17 year veteran of usenet -- you'd think I'd be over it by now

Donald:

I use my 12-/25 set but add the 11/12/13 cogs from my 11-23 set for a final combo of
11/12/13/15/17/19/21/23/25. The shifting between the 13 & the 15 is not perfect but it gives me both
a nice high end for the long downhills and that extra low gear for the big uphills. IMO if you live
in an area that has hills big enough for a 25 or 27, then you will probably get enough benefit from
the 11 to make it worth having.

MOO, Matt

Donald Specker wrote:

>I currently have an 11-23 on my Ultegra double and need more range. Should I go for the 12-27, or
>are there shifting issues, etc., that would steer me toward the 12-25. I can ride the 23, but have
>developed some "over-use" type injuries from riding the hills around here.
>
>Thanks.
>
>

On 24 Jul 2003 17:58:42 GMT, skubanut@aol.com (Mike Krueger) wrote:

>For this to work, you'll also need a diferent (larger diameter) lockring and 12 or 13T first
>position cog, which is knurled to mate with the lockring.

The 12 on an 11/12 is actually an end cog with integral spacer.

On Thu, 24 Jul 2003 12:54:06 +0000, Bill Davidson wrote:

> Michael wrote:
>> I went to 12-27 Ultegra a few years ago for the extra gear (actually I went from 8 speed Ultegra
>> 12-23 or 24 to 9 speed Dura Ace 12-27). I have no shifting issues at all. I can crank the 12 to
>> 35 mph downhill; I can't imagine needing an 11.
>
> How about if your largest front cog is a 46?

Mine is, and a 46/12 is quite big enough for anyone who isn't racing.

--

David L. Johnson

__o | The lottery is a tax on those who fail to understand _`\(,_ | mathematics. (_)/ (_) |

On Thu, 24 Jul 2003 09:23:38 -0400, dorn <xdoxrnx@one.net> wrote:

> 12-27 shifts perfect and it gives you a bailout gear, plus unless you are pretty strong its not
> that often you need more than a 12.

Agreed, 12-27 shifts fine on my 2001 105 double rear derailleur. I'd have liked an 11-27, but I
don't think it was available. Around here, there's lots of [sometimes short] hills where it's easy
enough, even with weak wimpy legs like mine, to use up all my gears and spin up pretty fast, past my
most efficient cadence.

Close-ratio road gears are great for strong, well trained cyclists, but I could really use a wider
total range, myself. Should've bought the triple...

> Chris
--
Rick Onanian

On Thu, 24 Jul 2003 20:54:05 -0400, Rick Onanian <spamsink@cox.net> wrote:

>liked an 11-27, but I don't think it was available.

11,12,13,14,16,18,21,24,28 A loose cog 11/32 cassette with a 13t or preferrable 12,13 from another
cassette. I put one together for a 650c wheel and 50/40 crankset.