Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

XT Rear Derailieur is hesitating

Notices
Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

XT Rear Derailieur is hesitating

Old 11-21-13, 08:20 AM
  #1  
Tandem Tom
Senior Member
Thread Starter
 
Join Date: Dec 2011
Location: NE Ohio
Posts: 2,155

Bikes: 1992 Serotta Colorado II,Co-Motion Speedster, Giant Escape Hybrid, 1977 Schwinn Super Le Tour

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 298 Post(s)
Likes: 0
Liked 26 Times in 22 Posts
XT Rear Derailieur is hesitating

I recently built up 2 LHT's and recently I have noticed a "hesitation" when I up shift. I increased the housing length at the RD thinking I was too short. It helped some but I still have the problem. Is there a super slick housing I should consider? Or am I missing something?
BTW it does it either while riding ori n the stand.
Thanks!
Tandem Tom is offline  
Old 11-21-13, 09:18 AM
  #2  
HillRider
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 32,016

Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!

Mentioned: 34 Post(s)
Tagged: 0 Thread(s)
Quoted: 1358 Post(s)
Likes: 0
Liked 179 Times in 146 Posts
Does it downshift with great enthusiasm but upshift sluggishly? That's often a sign of too much cable tension. Turn the barrel adjuster clockwise a half turn and see it that helps. You want up and down shifts to be about the same quickness. Otherwise you either have a sticky pivot in the rear derailleur (oil it) or something's dragging in the housing.
HillRider is offline  
Old 11-21-13, 09:38 AM
  #3  
Tandem Tom
Senior Member
Thread Starter
 
Join Date: Dec 2011
Location: NE Ohio
Posts: 2,155

Bikes: 1992 Serotta Colorado II,Co-Motion Speedster, Giant Escape Hybrid, 1977 Schwinn Super Le Tour

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 298 Post(s)
Likes: 0
Liked 26 Times in 22 Posts
Yes, it down shifts fine. I will back off on the tension. Thanks
Tandem Tom is offline  
Old 11-21-13, 10:14 AM
  #4  
FBinNY 
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 35,964

Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter

Mentioned: 124 Post(s)
Tagged: 1 Thread(s)
Quoted: 4359 Post(s)
Likes: 0
Liked 14 Times in 14 Posts
It could be trim bias, so it upshifts better than normal, and downshifts worse.

OTOH, I see you're in Ohio, and if this is a new problem for you, it could simply be the weather. Cold thickens whatever lube you use in cable housings, It's not an issue when pulling the cable by trigger, but the derailleur return springs have trouble pulling it back against the more viscous lube.

If you use oil or grease in your housing, switch to something less viscous in the cold, like a completely dry Moly-disulfide lube or graphite (lock) lube, or a cold weather synthetic oil such as 5w Mobil 1.
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is offline  
Old 11-21-13, 11:48 AM
  #5  
Tandem Tom
Senior Member
Thread Starter
 
Join Date: Dec 2011
Location: NE Ohio
Posts: 2,155

Bikes: 1992 Serotta Colorado II,Co-Motion Speedster, Giant Escape Hybrid, 1977 Schwinn Super Le Tour

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 298 Post(s)
Likes: 0
Liked 26 Times in 22 Posts
I was wondering if the lube might have been "thickening". I think I have some lock lube on a shelf in the basement.
Thanks!
Tandem Tom is offline  
Old 11-21-13, 12:51 PM
  #6  
FBinNY 
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 35,964

Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter

Mentioned: 124 Post(s)
Tagged: 1 Thread(s)
Quoted: 4359 Post(s)
Likes: 0
Liked 14 Times in 14 Posts
Originally Posted by Tandem Tom View Post
I was wondering if the lube might have been "thickening". I think I have some lock lube on a shelf in the basement.
Thanks!
I use Chain-L in my RD rear cable loop in warm weather (because I have it) and it's fine for the job. But it cause sluggish spring response as the weather cools. Adding a dry lube, or thinning with solvent doesn't help, so I flush it, and replace with a winter brew of very thin synthetic oil and graphite.
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is offline  
Old 11-21-13, 05:24 PM
  #7  
Andrew R Stewart 
Senior Member
 
Andrew R Stewart's Avatar
 
Join Date: Feb 2012
Location: Rochester, NY
Posts: 13,208

Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Raleigh Pro, Trek Cycle Cross, Mongoose tomac ATB, GT Bravado ATB, JCP Folder

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2295 Post(s)
Liked 378 Times in 303 Posts
When i had my shop in Cleveland, OH we would get Winter riders (often bike messengers) complaining of locked up freewheels. They would call during the day and come in toward the evening (after riding the rest of the day in a "fixed" configuration). My shop had a classic steam radiator right by the front door that also acted as a convenient bike rack (for skinny tires). These riders would park their bike in the radiator and come up to the counter. It was usually a few minutes before we'd get to their bike. In the meantime it would be dripping off, slush and frozen crud dropping onto the floor. Most every time we picked up the back end of the bike, spun the rear wheel and had proper freewheeling.

As you can guess by now the slush/water had gotten into the freewheel/freehub and frozen it up tight during the rider's day. Placing the bike near a hot source melted the freezed up ratchet and Lo and Behold all was good. Until the next day! We would flush the ratchet with solvent (we had a few Stein and Morningstar injector devices) then with lube. And for a while the problem was gone. Andy.
Andrew R Stewart is offline  
Old 11-21-13, 05:43 PM
  #8  
noglider 
aka Tom Reingold
 
noglider's Avatar
 
Join Date: Jan 2009
Location: High Falls, NY, USA
Posts: 38,778

Bikes: 1962 Rudge Sports, 1971 Raleigh Super Course, 1971 Raleigh Pro Track, 1974 Raleigh International, 1975 Viscount Fixie, 1982 McLean, 1996 Lemond (Ti), 2002 Burley Zydeco tandem

Mentioned: 467 Post(s)
Tagged: 0 Thread(s)
Quoted: 6308 Post(s)
Liked 840 Times in 550 Posts
So ... cleanliness is next to Fredliness.
__________________
Tom Reingold, tom@noglider.com
New York City and High Falls, NY
Blogs: The Experienced Cyclist; noglider's ride blog

“When man invented the bicycle he reached the peak of his attainments.” — Elizabeth West, US author

Please email me rather than PM'ing me. Thanks.
noglider is offline  
Old 11-22-13, 12:20 AM
  #9  
bikeman732
Senior Member
 
Join Date: Sep 2012
Location: Tampa FL
Posts: 69

Bikes: 2004 Cannondale R3000, 1972 Raleigh Professional, 1976 Raleigh International 1990 Jamis Explorer, 1989 Bottecchia SLX

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
If by "upshift" you mean to the smaller rear sprockets, the best way to be sure it is the cable and not a sticky derailleur is disconnect the cable and shift to a big sprocket with your hand (carefully, so as not to put your fingers in moving parts) and let the spring shift it back to the small sprockets. If no hesitation you know the cable is the culprit. Check for kinked ferrules at the cable stops too.
bikeman732 is offline  
Old 11-22-13, 05:26 AM
  #10  
speedy25
Senior Member
 
Join Date: Mar 2012
Location: NE oHIo
Posts: 936

Bikes: Specialized, Trek, Diamondback, Schwinn, Peugeot

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 113 Post(s)
Liked 4 Times in 4 Posts
Dont forget you have to dissolve the thick lube out of the housing before using the dry or thin lube.

I've had the same problems with cables when setting up motorcycles for ice racing. Dri slide was a favorite when it was available.

Tom- are you one of the tandem riders I see at the Critical Mass rides?

-SP

Last edited by speedy25; 11-22-13 at 05:35 AM.
speedy25 is offline  
Old 11-22-13, 07:20 AM
  #11  
Tandem Tom
Senior Member
Thread Starter
 
Join Date: Dec 2011
Location: NE Ohio
Posts: 2,155

Bikes: 1992 Serotta Colorado II,Co-Motion Speedster, Giant Escape Hybrid, 1977 Schwinn Super Le Tour

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 298 Post(s)
Likes: 0
Liked 26 Times in 22 Posts
No, we have not ridden in one yet.
Tandem Tom is offline  
Old 11-22-13, 07:29 AM
  #12  
reptilezs
Senior Member
 
Join Date: Sep 2004
Location: boston, ma
Posts: 2,896
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
if you have a shadow style xt then the "b" screw must be set as close as possible for best shift performance
reptilezs is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
denada
Bicycle Mechanics
7
08-04-19 09:35 PM
u235
Cyclocross and Gravelbiking (Recreational)
11
05-31-19 07:32 PM
dglevy
Bicycle Mechanics
33
09-13-18 09:17 PM
mak755
Bicycle Mechanics
1
05-12-18 08:54 PM
jrickards
Winter Cycling
4
03-23-14 04:49 PM

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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.