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


Go Back   > >

Touring Have a dream to ride a bike across your state, across the country, or around the world? Self-contained or fully supported? Trade ideas, adventures, and more in our bicycle touring forum.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 02-08-07, 09:06 AM   #1
Tom N.
Senior Member
Thread Starter
 
Join Date: Feb 2005
Bikes:
Posts: 52
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
34T shifting problems?

I've read snippets on various threads suggesting that people sometimes have shifting problems when running a 11-34 or 12-34 rear cassette. Indeed, one contributer appeared to suggest that some bike companies spec their tourers and MTBs with 11-32, rather than 11-34, rear cassettes because of these shifting problems.

How prevalent are, and exactly what is the nature of, the shifting problems being alluded to? Is it difficult to get into the 34T gear, or is their a slippage problem once in the gear, or what?
Tom N. is offline   Reply With Quote
Old 02-08-07, 09:14 AM   #2
vik 
cyclopath
 
vik's Avatar
 
Join Date: Apr 2006
Location: Victoria, BC
Bikes: Surly Krampus, Surly Straggler, Pivot Mach 6, Bike Friday Tikit, Bike Friday Tandem, Santa Cruz Nomad
Posts: 5,265
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I have 11-34 cassettes on 4 bikes and have never had any shifting problems in many years of use.
__________________
safe riding - Vik
VikApproved
vik is offline   Reply With Quote
Old 02-08-07, 10:14 AM   #3
cyccommute 
Mad bike riding scientist
 
cyccommute's Avatar
 
Join Date: Nov 2004
Location: Denver, CO
Bikes: Some silver ones, a black one, a red one, an orange one and a couple of titanium ones
Posts: 18,044
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 216 Post(s)
Quote:
Originally Posted by vik
I have 11-34 cassettes on 4 bikes and have never had any shifting problems in many years of use.
I have 34s on everything and always have had. No issues really other then a tandem that gave me fits on everything anyway. The B screw is your friend.
__________________
Stuart Black
New! Pokin' around the Poconos A cold ride around Lake Erie
New! Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
Days of Wineless Roads. Bed and Breakfasting along the KATY
Twisting Down the Alley. Misadventures in tornado alley.
An Good Ol' Fashion Appalachian Butt Whoopin'.
cyccommute is offline   Reply With Quote
Old 02-08-07, 10:29 AM   #4
velonomad 
Older I get, Better I was
 
velonomad's Avatar
 
Join Date: Nov 2003
Location: Greenfield Lake, Wilmington NC
Bikes: '14 BD Lurch Fatbike, '10 custom road,'06 custom expedition, '94 Yokota Tandem, '88 custom MTB
Posts: 1,711
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 15 Post(s)
I had issues with the 12-34 alpine (12-28 to 34) on one of my bikes but that was because the 18 year-old Deore XT dérailleur finally got so sloppy it wouldn't push the chain over. New dérailleur fixed it.
velonomad is offline   Reply With Quote
Old 02-08-07, 03:56 PM   #5
GTcommuter
Easily distracted...
 
Join Date: Nov 2004
Location: Decatur, Ga
Bikes: Surley Cross Check
Posts: 1,067
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by velonomad
I had issues with the 12-34 alpine (12-28 to 34) on one of my bikes but that was because the 18 year-old Deore XT dérailleur finally got so sloppy it wouldn't push the chain over. New dérailleur fixed it.
I would imagine that problems come from older derailers or road derailers not designed to accommodate that range of gears.
GTcommuter is offline   Reply With Quote
Old 02-09-07, 03:31 AM   #6
fks
Shoot Your Car
 
fks's Avatar
 
Join Date: Mar 2003
Location: Land Down Under
Bikes: too many
Posts: 121
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by vik
I have 11-34 cassettes on 4 bikes and have never had any shifting problems in many years of use.

+1
fks is offline   Reply With Quote
Old 02-09-07, 05:31 AM   #7
onbike 1939
Senior Member
 
onbike 1939's Avatar
 
Join Date: Dec 2004
Location: Fife Scotland
Bikes: Airnimal Chameleon; Ellis Briggs; Moulton TSR27 Moulton Esprit
Posts: 2,022
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 100 Post(s)
Quote:
Originally Posted by GTcommuter
I would imagine that problems come from older derailers or road derailers not designed to accommodate that range of gears.
+1
I think that most of the problems arising with the 34t are solved by using a XT rear derr. which copes with the extra capacity needed.
onbike 1939 is offline   Reply With Quote
Old 02-09-07, 01:54 PM   #8
FidelCastrovich
Patria O Muerte!
 
Join Date: Jan 2007
Location: Jerusalem,Israel
Bikes: Pinarello road bike, Marin Kentfield city bike
Posts: 315
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by onbike 1939
+1
I think that most of the problems arising with the 34t are solved by using a XT rear derr. which copes with the extra capacity needed.

Running a 12-34, non Shimano freewheel with no problems. Acera der. so don't think XT is a must.
FidelCastrovich is offline   Reply With Quote
Old 02-11-07, 09:12 PM   #9
grolby
Senior Member
 
grolby's Avatar
 
Join Date: Jan 2005
Location: BOSTON BABY
Bikes:
Posts: 9,312
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 77 Post(s)
Quote:
Originally Posted by onbike 1939
+1
I think that most of the problems arising with the 34t are solved by using a XT rear derr. which copes with the extra capacity needed.
You don't need an XT. I honestly think that anything above Deore (what I've got for a rear derailer) is a waste of money for a tourist. I don't begrudge anyone picking out the higher spec ones, but the only real advantage of the nicer ones is weight, and not a lot of weight at that.

I've never had a shifting problem with 34T cogs, by the way, even with my 20 year-old Light Action derailer. The chain actually seems to love shifting onto that huge cog, I've never had anything but nice, smooth shifts.
grolby is offline   Reply With Quote
Old 02-11-07, 09:52 PM   #10
teamcompi
Senior Member
 
teamcompi's Avatar
 
Join Date: Sep 2006
Location: Houston B.C.
Bikes:
Posts: 271
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
We go up to a 34 on a number of the bikes in the family and they all work just fine.
teamcompi is offline   Reply With Quote
Old 02-11-07, 10:22 PM   #11
Erick L
Lentement mais sûrement
 
Erick L's Avatar
 
Join Date: Jan 2003
Location: Montréal
Bikes:
Posts: 2,153
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
I use a 12-32 with a 26-32 jump on a STX-RC derailer (1995, came with a 11-28). No problem.
Erick L 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 01:34 AM.