Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Fifty Plus (50+) Share the victories, challenges, successes and special concerns of bicyclists 50 and older. Especially useful for those entering or reentering bicycling.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 03-03-11, 07:03 AM   #1
NOS88
Senior Member
Thread Starter
 
NOS88's Avatar
 
Join Date: Mar 2006
Location: Montgomery County, Pennsylvania
Bikes:
Posts: 6,490
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
11-27 or 12-28?

I'm going to swap out the cassette on my Colnago Master XL to one with a wider range. I'll be taking it with me when I visit my brother in the next few weeks, and he has some pretty draining "rolling hills" where he lives. His suggestion is that I go with either an 11-27 or 11-28. When I talk to the mechanics at my LBS, they are not in agreement with which will function better with the Dura 7800 series drive train I currently have one it (Yes, I know it's a sin to hang Japanese parts on an Italian frame, but the DA is what was on it when I bought it.) One mechanic says the 7800 series rear dérailleur isn't really capable of dealing with a compact up front and a 28 tooth in the rear. The other says it should work fine. Any of you have experience with the 7800 series with a compact up front and 11-28 cassette?
__________________
A conclusion is the place where you got tired of thinking. - S. Wright
Favorite rides in the stable: Indy Fab CJ Ti - Colnago MXL - S-Works Roubaix - Habanero Team Issue - Jamis Eclipse carbon/831
NOS88 is offline   Reply With Quote
Old 03-03-11, 08:18 AM   #2
AzTallRider 
I need speed
 
AzTallRider's Avatar
 
Join Date: Sep 2009
Location: Phoenix, AZ
Bikes: Giant Propel, Cervelo P2
Posts: 5,550
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I don't have experience, but saw this on Shimano's site:

NOTE: CS-7900 11-27 and 11-28 require the use of RD-7900 or RD-6700
__________________
"If you're riding less than 18 MPH up a 2% grade please tell people Coggan is coaching you."
AzTallRider is offline   Reply With Quote
Old 03-03-11, 08:52 AM   #3
tsl
Plays in traffic
 
tsl's Avatar
 
Join Date: May 2006
Location: Rochester, NY
Bikes: 1996 Litespeed Classic, 2006 Trek Portland, 2013 Ribble Winter/Audax
Posts: 6,955
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
One tooth at the the 27/28 end isn't a hill of beans difference. Any benefit is likely to be psychological.

I thought "rolling hills" was basically the geography of the entire state of PA. There's a flat part where you live?
tsl is offline   Reply With Quote
Old 03-03-11, 09:59 AM   #4
BikeWNC
Climbing Above It All
 
BikeWNC's Avatar
 
Join Date: Oct 2004
Location: Basking in the Sun.
Bikes:
Posts: 4,146
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I have one bike with DA 7800, Ultergra SL compact crank, that uses a SRAM 11-28 cassette just fine. The other bike had DI2 DA compact crank with a DA 11-28 cassette. Both work great. If you climb all the time, it's the gearing I would suggest. Unless of course you need a bike that has a mtb rear der. and a 11-32.
BikeWNC is offline   Reply With Quote
Old 03-03-11, 10:39 AM   #5
bobthib
Legs; OK! Lungs; not!
 
bobthib's Avatar
 
Join Date: Apr 2009
Location: Coral Springs, FL
Bikes: ''09 Motobecane Immortal Pro (Yellow), '02 Diamondback Hybrid, '09 Lamborghini Viaggio, ''11 Cervelo P2
Posts: 2,095
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I got an 11-28 for the Horrible Hundred in November. I have DA brifters and Ultegra RD and had no problems.
bobthib is offline   Reply With Quote
Old 03-03-11, 11:11 AM   #6
Garilia
Senior Member
 
Garilia's Avatar
 
Join Date: Sep 2010
Location: South Park...ing Lot
Bikes: Fantom 29
Posts: 554
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Man, and here I thought 11-27 was Thanksgiving or something in 2011!
Garilia is offline   Reply With Quote
Old 03-03-11, 07:44 PM   #7
tlc20010
The Grampster
 
tlc20010's Avatar
 
Join Date: Sep 2005
Location: Washington, DC
Bikes: Eddy Merckx SXM, LeMond Buenos Aires, Cannondale Road Warrior 1000 plus a couple of comforts (Specialized Crossroads and Giant Cyprus) and a beater mtb for around town.
Posts: 657
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I've got a DA with a 12-28 and a compact crank and have never had any sort of shifting problems. Just remember to get on the 28 before you need it, not when you are desperate.
__________________
The definition of insanity is doing the same thing over and over and expecting different results.
--Ben Franklin
tlc20010 is offline   Reply With Quote
Old 03-03-11, 09:54 PM   #8
John E
feros ferio
 
John E's Avatar
 
Join Date: Jul 2000
Location: www.ci.encinitas.ca.us
Bikes: 1959 Capo; 1980 Peugeot PKN-10; 1981 Bianchi; 1988 Schwinn KOM-10;
Posts: 17,162
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 98 Post(s)
28T is right at the upper limit of the derailleur's capacity, so much depends on chain length, rear axle position (although you don't have any choice w/ vertical dropouts), and derailleur hanger tab length. Is 12-27 an option? I don't have any use for an 11T cog, even w/ a compact ringset, although some folks do.
__________________
"Early to bed, early to rise. Work like hell, and advertise." -- George Stahlman
Capo [dschaw'-poe]: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger, S/N 42624
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1981 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
John E is offline   Reply With Quote
Old 03-04-11, 12:38 AM   #9
billydonn
Council of the Elders
 
billydonn's Avatar
 
Join Date: Jul 2008
Location: Omaha, NE
Bikes: 1990 Schwinn Crosscut, 5 Lemonds
Posts: 3,761
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I would use the 11-28 if I had any doubt. It should work fine. 28 vs 27 isn't a real big difference but it's a difference that could help a little.
billydonn is offline   Reply With Quote
Old 03-04-11, 03:01 PM   #10
NOS88
Senior Member
Thread Starter
 
NOS88's Avatar
 
Join Date: Mar 2006
Location: Montgomery County, Pennsylvania
Bikes:
Posts: 6,490
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I went with the 11-27, and took it for a shake-down ride this afternoon. It shifts just fine. Thanks for the replies.
__________________
A conclusion is the place where you got tired of thinking. - S. Wright
Favorite rides in the stable: Indy Fab CJ Ti - Colnago MXL - S-Works Roubaix - Habanero Team Issue - Jamis Eclipse carbon/831
NOS88 is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 06:30 AM.