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 10-23-00, 12:21 PM   #1
fongster
Junior Member
Thread Starter
 
Join Date: Oct 2000
Location: So. Cal.
Bikes:
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I just installed a new XT rear derailleur on my 1990 Fisher Paragon. I tuned it per Shimano's specs. Shifts well until I get to the middle of the 7 speed cassette. From there up, as the chain moves up to the 24, 29, 34 there's a little clicking, like the chain's just kissing the next cog uphill from it. I turned the pedal slowly and noticed a few rivets lightly brushing the cog uphill from where the chain sits. The chain is a SRAM PC51 which is about a year old, riding about 6-12 miles a week offroad. Is it common for the rivets to brush the cassette? I'm sure it's tuned correctly. There's no prob on the higher gears. Maybe just buy a new chain? It's the same chain I had on there before but there was no noise with the old derailleur which was really sloppy in its mounting bushing area. Thanks.
fongster is offline   Reply With Quote
Old 10-23-00, 03:17 PM   #2
fongster
Junior Member
Thread Starter
 
Join Date: Oct 2000
Location: So. Cal.
Bikes:
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Local mechanics opinion

I normally don't answer my own posts but thought this might be of interest. The local wrench felt the pins have moved from their torque of shifting on the steeps. The reason I didn't notice it before was due to the sloppy derailleur. Try a new chain--hopefully the cassette hasn't worn too much with the old one.

[Edited by fongster on 10-23-2000 at 06:32 PM]
fongster is offline   Reply With Quote
Old 10-24-00, 12:24 AM   #3
RoadRash
Senior Member
 
Join Date: Jan 2000
Bikes:
Posts: 85
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Ahh

I read your first post earlyer today, but i had no idea of what it could be, thanks for the update.
RoadRash is offline   Reply With Quote
Old 01-30-01, 12:49 PM   #4
mike
Senior Member
 
mike's Avatar
 
Join Date: Jul 2000
Location: Snowy midwest
Bikes:
Posts: 5,392
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Chain and sprocket wear

Could it be that your sprocket/chain is wearing and allowing the chain to seat lower in the trough of the sprocket cogs?

This would be a reasonable assumption if your preferred sprocket is the one you are having trouble with now.

Although you are not putting a lot of miles on your bike, you are riding in dirty/dusty conditions which will certainly cause your chain and sprocket to wear faster than under road riding conditions- especially if you are not good about keeping your drive trane clean.
mike is offline   Reply With Quote
Old 01-30-01, 02:39 PM   #5
Hunter
NOT a weight weenie
 
Hunter's Avatar
 
Join Date: Dec 2000
Bikes:
Posts: 1,762
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Well what I would advise you look at is the chain line coming down from the jockey pulley (top pulley) of the der. to see if it is in a straight line with the cogs. If not turn the barrel adjuster either clockwise or counterclockwise until it is. Then get on ride it and shift through the gears to see if that got it. If not go replace the chain. If this persists or is worse than go replace the cassette. That should fix it.
Hunter is offline   Reply With Quote
Old 03-05-01, 03:32 AM   #6
Buddy Hayden
Guitar Hero
 
Join Date: Aug 2000
Bikes:
Posts: 403
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I have noticed more times than I care to remember that sram chains do start to get noisy as you work your way up the cassette !...its' shimanos way of saying your using the wrong chain for our HG/IG cassettes....try a HG70 and the noises go away...........
__________________
Velosophy#1: It is better to have a bicycle and no money , than money and no bicycle ! Velosophy # 2 : "Winning is simple, but not easy." #3: "Give a man a fish and he shall eat for a day , teach him how to fish and he will sit in a boat and drink beer all day"
Buddy Hayden is offline   Reply With Quote
Old 03-05-01, 04:58 AM   #7
toolfreak
Ich bin ein Lowlander!
 
toolfreak's Avatar
 
Join Date: Mar 2001
Location: Atlantic Ocean, France
Bikes:
Posts: 583
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Never ever use SRAM and shimano together, even if people tell you that you can combine parts from the two brands

THEY,RE TRYING TO FOOL YOU!

Well it`s not that serious,but to avoid shifting problems, its best to stay with one brand.

When your changing your derialleur cogs or your sprocket, ALWAYS replace the chain, that should do it.

smoothshifting!

Mark
toolfreak is offline   Reply With Quote
Old 03-05-01, 02:40 PM   #8
RainmanP
Mr. Cellophane
 
RainmanP's Avatar
 
Join Date: Nov 2000
Location: New Orleans, LA
Bikes:
Posts: 3,037
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Mark,
Are you suggesting that if my fairly new bike has SRAM chain and Shimano HG cassette that it might shift better with a gen-you-wine Shimano HG chain. Derailleur is also SRAM. Shifting is OK but could be much better.
Thanks,
Raymond
RainmanP is offline   Reply With Quote
Old 04-04-01, 10:33 AM   #9
riderx
BFSSFG old timer
 
riderx's Avatar
 
Join Date: Apr 2001
Location: Fredrock
Bikes:
Posts: 1,913
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I would also check the derailluer and hanger to make sure they are perfectly straight. If not, they may be causing problems in the bigger cogs, but nothing else.
riderx 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 02:00 AM.