12-27 vs 12-25

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

Quoted message said:

I currently have an 11-23 on my Ultegra double and need more range.

Should

Quoted message said:

I go for the 12-27, or are there shifting issues, etc., that would steer

me

Quoted message said:

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 <[email hidden]> 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 said:

dorn <[email hidden]> 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?

Quoted message said:

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.

Donald Specker said:

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
<[email hidden]>]

Quoted message said:

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

Quoted message said:

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" <[email hidden]> wrote ...

Quoted message said:

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

Quoted message said:

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 said:

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 said:

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.

(Mike Krueger) said:

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.

Bill Davidson said:

Michael said:

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. (_)/ (_) |

dorn said:

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...

Quoted message said:

Chris

--
Rick Onanian

Rick Onanian said:

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.

Here we go with this again. You've got it exactly backwards - it is precisely because non-racers are
not racers that they need a taller gear.

Doug

"David L. Johnson" <[email hidden]> wrote in message
news:<[email hidden]>...

Quoted message said:

Bill Davidson said:

Michael said:

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.

Donald Specker said:

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've got 12-25 on one bike, and 12-27 on another. I don't notice any gaps on the 12-27, and it's
nice to have the 27 when I need it. If you're going to make a change, go for the 12-27.

The only difference is the last two cogs:

12-....21-23-25

vs.

12-....21-24-27

Art Harris

"Donald Specker" <[email hidden]> wrote in message
news:<[email hidden]>...

Quoted message said:

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.

i don't think you will have any shifting issues going with the lower gear. on my own bike, i use an
11-30 MTB cassette with a long cage shimano deore (off-road) derailleur. it works just fine with
both STIs and bar-con shifters. smokey

"Donald Specker" <[email hidden]> wrote in message
news:<[email hidden]>...

Quoted message said:

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.

SRAM sells a 12-26 cassette thats the same as the shimano 12-25 except for the 26t cog. That's as
large as I can go with my setup, campy 9sp
w/ shimano compatible cassetes. I've tried to use 12-27 in the past, but the pulley was too close to
the 27t cog and would run rough. A longer angle adjustment screw would likely cure that. One
advantage of the SRAM cassetes is that they can be completely disassembled for cleaning with a T6
Torx wrench.

Bret