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


Go Back   > >

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.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 08-25-08, 08:38 AM   #1
kblacy
Senior Member
Thread Starter
 
kblacy's Avatar
 
Join Date: Aug 2007
Location: San Antonio
Bikes:
Posts: 78
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Shifting Problem

For the last couple of rides I have had a problem downshifting into the middle cog on my 10-speed Ultegra cassette. I run a standard 12-25 cassette and keep it well lubed. It's only the middle cog and only when downshifting a single gear. If I do a 2-gear jump it works, but always hangs on a single. I've got the RD dialed in as but can't figure this out.
kblacy is offline   Reply With Quote
Old 08-25-08, 08:48 AM   #2
capwater
Senior Member
 
capwater's Avatar
 
Join Date: Dec 2004
Location: Quahog, RI
Bikes: Giant TCR Comps, Cdale R5000, Klein Q-Pro, Litespeed Siena, Piasano 105, Redline Conquest Pro, Voodoo Bizango, Fuji Aloha
Posts: 1,509
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
cables
capwater is offline   Reply With Quote
Old 08-25-08, 09:15 AM   #3
dunningrb
Senior Member
 
dunningrb's Avatar
 
Join Date: Aug 2008
Location: Farmville, VA
Bikes: Trek 5200, Scattante R-560
Posts: 203
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
^^^^ A bike shop can fix this in ten minutes, once they get to it. You can learn to do it yourself. Literally every bicycle on the road periodically requires this kind of adjustment.
dunningrb is offline   Reply With Quote
Old 08-25-08, 11:40 AM   #4
G piny parnas
messenger
 
Join Date: Aug 2008
Location: WLA
Bikes: pinarellos and a colnago
Posts: 599
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
with your hand

your shifters could be sticky--- a crushed cable guide or casing--- the housing (gears) could need replacing--- clean and lube.......pull the cable with your hand and feel the progression
G piny parnas is offline   Reply With Quote
Old 08-25-08, 12:57 PM   #5
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: 2,026
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 250 Post(s)
This is usually caused by the cable sticking in the loop which leads down to the RD. Try some wd40 inside the cable and change the rear gears up and down the range. When the cable becomes free, oil the cable. To do the job properly of course you could dismantle the cable and outer, use WD40 to clean the outer, re-grease the cable, re-assemble and adjust the gears.
onbike 1939 is offline   Reply With Quote
Old 08-25-08, 02:29 PM   #6
z415
Senior Member
 
z415's Avatar
 
Join Date: Apr 2006
Location: Gainesville/Tampa, FL
Bikes: Trek 1000, two mtbs and working on a fixie for commuting.
Posts: 2,343
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Rock ' n Roll cable magic is supposed to work wonders for this. Apply liberally at entry points and twirl your bike around and voila! (supposedly)
z415 is offline   Reply With Quote
Old 08-25-08, 04:49 PM   #7
G piny parnas
messenger
 
Join Date: Aug 2008
Location: WLA
Bikes: pinarellos and a colnago
Posts: 599
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
wd 40 is not the wonder for cables and housing--- the plastic guide inside the housing melts--- it takes dirt with it down the guide and basically is only an emergency fix--- replace the housing with fresh plastic inserts--- shimano or campi --- the good stuff and a little phil grease--- works for me......
G piny parnas is offline   Reply With Quote
Old 08-25-08, 04:54 PM   #8
G piny parnas
messenger
 
Join Date: Aug 2008
Location: WLA
Bikes: pinarellos and a colnago
Posts: 599
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
to add--- unless the cable is rusty--- you need only mess with the casing and adjustment of slack--- cheap housing is cheap, sometimes all the housing can be dis-assembled while leaving the der connection--- bike shops get away with tune and cleans this way--- I would take the whole thing apart and learn ----
G piny parnas is offline   Reply With Quote
Old 08-25-08, 05:15 PM   #9
Al1943
Senior Member
 
Join Date: Feb 2005
Location: Oklahoma
Bikes: Trek 5500, Colnago C-50
Posts: 9,433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
But don't take the shifter apart.
Al1943 is offline   Reply With Quote
Old 08-25-08, 06:30 PM   #10
Donegal
Road Nazi Hunter
 
Donegal's Avatar
 
Join Date: Jul 2007
Location: Slow! But Ahead of You.
Bikes: Kuota Kredo, Litespeed Vortex, Aegis Victory, Burley Tandem, Cannondale Rush
Posts: 409
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
If the problem hits while downshifting,, It is probably not just the cable since you are pulling the cable under a load from the shifter and it is a direct movement. If the cable was sticking, it would hesitate or not shift when shifting up. I had a similar problem with a campy 10 speed. I could hit every gear but it skipped back and forth on the center two gears. I had to re-time the entire cassette including opening up the limit screws. It was happening because the shifters were one detent off the way we had the timing set.

Try to reset your derailleur from the beginning and see if you can hit all the gears.
Donegal is offline   Reply With Quote
Old 08-25-08, 07:46 PM   #11
puchguy
Newbie
 
Join Date: Jul 2008
Bikes:
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by dunningrb View Post
^^^^ A bike shop can fix this in ten minutes, once they get to it. You can learn to do it yourself. Literally every bicycle on the road periodically requires this kind of adjustment.
Were you referring to capwater's answer (cables)? If otherwise, please describe.
puchguy is offline   Reply With Quote
Old 08-26-08, 11:46 AM   #12
kblacy
Senior Member
Thread Starter
 
kblacy's Avatar
 
Join Date: Aug 2007
Location: San Antonio
Bikes:
Posts: 78
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I was at the Hotter N Hell this past weekend and took my bike to the Shimano support truck for them to look at it. They only spent a couple of minutes with it since there were a million people there but the Shimano wrench was at a loss. Since both the chain and cables are new, I'm starting to wonder if there is a defect in the shifter. Has anyone had any problems with 10-speed Ultegra shifters like this?
kblacy is offline   Reply With Quote
Old 08-26-08, 12:01 PM   #13
DannoXYZ 
Senior Member
 
DannoXYZ's Avatar
 
Join Date: Jul 2005
Location: Saratoga, CA
Bikes:
Posts: 11,606
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Quote:
Originally Posted by kblacy View Post
For the last couple of rides I have had a problem downshifting into the middle cog on my 10-speed Ultegra cassette. I run a standard 12-25 cassette and keep it well lubed. It's only the middle cog and only when downshifting a single gear. If I do a 2-gear jump it works, but always hangs on a single. I've got the RD dialed in as but can't figure this out.
What do you mean by "downshifting"? Moving from larger cogs to smaller cogs? If that's the issue, then it's definitely cable-friction of some sort.
DannoXYZ is offline   Reply With Quote
Old 08-26-08, 12:05 PM   #14
kblacy
Senior Member
Thread Starter
 
kblacy's Avatar
 
Join Date: Aug 2007
Location: San Antonio
Bikes:
Posts: 78
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by DannoXYZ View Post
What do you mean by "downshifting"? Moving from larger cogs to smaller cogs? If that's the issue, then it's definitely cable-friction of some sort.
No, moving from smaller to larger cogs.
kblacy is offline   Reply With Quote
Old 08-26-08, 12:17 PM   #15
DannoXYZ 
Senior Member
 
DannoXYZ's Avatar
 
Join Date: Jul 2005
Location: Saratoga, CA
Bikes:
Posts: 11,606
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
What levers, RD, #speeds, etc? It could be an adjustment and it could also be a case of mismatched parts.
DannoXYZ is offline   Reply With Quote
Old 08-26-08, 12:20 PM   #16
kblacy
Senior Member
Thread Starter
 
kblacy's Avatar
 
Join Date: Aug 2007
Location: San Antonio
Bikes:
Posts: 78
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I have Ultegra 10 speed levers, Ultegra RD, a 105 12/25 cassette, and a 53/39 chainring.

I have also tried my other wheel which has a dura ace 11/21 cassette and it has the same problem in the same spot.
kblacy is offline   Reply With Quote
Old 08-28-08, 07:02 AM   #17
kblacy
Senior Member
Thread Starter
 
kblacy's Avatar
 
Join Date: Aug 2007
Location: San Antonio
Bikes:
Posts: 78
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
So I've tried everything I can think of. New chain, cables, different wheel, even let my brother ride it. Same thing. I've decided to just send in the shifter and let Shimano warranty it. I sure hope this solves the problem.
kblacy is offline   Reply With Quote
Old 08-28-08, 08:19 AM   #18
z415
Senior Member
 
z415's Avatar
 
Join Date: Apr 2006
Location: Gainesville/Tampa, FL
Bikes: Trek 1000, two mtbs and working on a fixie for commuting.
Posts: 2,343
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Maybe slightly bent hanger? I had the same exact problem on a MTB.

Have you dropped your bike or put pressure on the RD/hanger lately? A LBS should be bale to do some magic and tell you if it is bent and then unbend it, if that is the problem.
z415 is offline   Reply With Quote
Old 08-28-08, 09:24 AM   #19
kblacy
Senior Member
Thread Starter
 
kblacy's Avatar
 
Join Date: Aug 2007
Location: San Antonio
Bikes:
Posts: 78
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I had my LBS check the hanger and they said it was spot on. This bike has been babied since day one. I had one guy tell me to just suck it up since it was only one gear that keeps missing, but to me it's akin to not being able to shift into third gear on your car.
kblacy is offline   Reply With Quote
Old 09-04-08, 07:59 AM   #20
kblacy
Senior Member
Thread Starter
 
kblacy's Avatar
 
Join Date: Aug 2007
Location: San Antonio
Bikes:
Posts: 78
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
So my LBS has had my bike for the last week and called me to say they had the problem fixed. They replaced the cables (again), replaced the derailleur hanger, and lubed every moving part. I took it out last night on a different wheel and it's still skipping in the same place when i downshift. Please help.
kblacy is offline   Reply With Quote
Old 09-04-08, 01:50 PM   #21
Al1943
Senior Member
 
Join Date: Feb 2005
Location: Oklahoma
Bikes: Trek 5500, Colnago C-50
Posts: 9,433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Well you could try shooting the shifter full of WD40, but if you plan to send it to Shimano don't do that.
Plan B would be to return it to Shimano going through the dealer that sold you the shifter.

Al
Al1943 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 11:37 AM.