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 07-11-09, 07:22 AM   #1
thundermustard
Junior Member
Thread Starter
 
Join Date: Jun 2007
Bikes:
Posts: 11
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Clicking noise on biggest cassette gear

I have a Ultegra SL rear derailer, it is a 20 speed bike.
The bike shifts smoothly and is quiet except for when I am in the smallest ring up front and the biggest gear on the cassette. Does it a little less when in the big ring up front.
Then it makes a clicking, almost baseball card in the spokes sound.
I cannot replicate this on the stand, it has to be when under a lot of power. I cannot replicate it by pedaling backwards.
I removed the plastic spoke protector thinking that could be it.
The bike is a few months old and just started doing this.
Anyone have an idea?
thundermustard is offline   Reply With Quote
Old 07-11-09, 09:02 AM   #2
bikeman715
Senior Member
 
bikeman715's Avatar
 
Join Date: Mar 2008
Location: Salinas , Ca.
Bikes: Bike Nashbar AL-1 ,Raligh M50 , Schwinn Traveler , and others
Posts: 2,436
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
try back off the low (L) screw on the dérailleur by 1/8 to 1/4 of turn.
bikeman715 is offline   Reply With Quote
Old 07-11-09, 10:08 AM   #3
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)
Be very careful if you adjust the low limit screw. If you back it out too much you could throw the chain into the spokes.
Try adjusting the "B" screw to add clearance between the derailleur pulley and the largest cog.
Try adding a bit of tension to the shift cable with 1/2 counter-clockwise turn on the barrel adjuster. If you turn it too far shifting will become sluggish going to smaller cogs.

Al
Al1943 is offline   Reply With Quote
Old 07-11-09, 11:20 AM   #4
dextor
Senior Member
 
Join Date: Oct 2008
Bikes:
Posts: 75
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Could be the B screw or H/L limit screws, play with them a bit but be careful with the H/L screws.
dextor is offline   Reply With Quote
Old 07-13-09, 08:58 AM   #5
thundermustard
Junior Member
Thread Starter
 
Join Date: Jun 2007
Bikes:
Posts: 11
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
It was the screw, the derailleur was not aligned with the biggest gear.
Thanks for the help.
thundermustard 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 01:13 PM.