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 11-01-05, 03:09 PM   #1
mooklekloon
Senior Member
Thread Starter
 
Join Date: Sep 2005
Location: Toronto, Ontario
Bikes:
Posts: 124
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
This is really hard to explain. When I am in the large chain ring on my bike and I put a lot of torque, the pedalling feels a "little rough". I can't hear anything but I can feel it in my feet. Mostly my right foot. Its a new (2 weeks old) specialized sirrus elite. I'm not cross chaining, and everything is well lubed. Some info that might be relavent:

FRONT DERAILLEUR Shimano Deore, 31.8 clamp, bottom pull
REAR DERAILLEUR Shimano Tiagra
CASSETTE SRAM PG-850, 8-speed, 12x26t
CRANKSET RPM Compact, five arm, polished
CHAINRINGS 50Ax34S Hypershift

Anyone have any ideas? I know its a vague explanation, but I appreciate any help.
mooklekloon is offline   Reply With Quote
Old 11-01-05, 05:11 PM   #2
jhglaw
Lawman
 
Join Date: Jan 2005
Location: San Diego, CA
Bikes: Spec. Tarmac Expert SL4
Posts: 198
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Ideas:

1. derailleur/indexed shifting slightly out of adjustment so the chain only rubs a little when you twist the bottom bracket/cranks with high pedal load

2. cranks not tightened to spec, check with a torque wrench

good luck
jhglaw is offline   Reply With Quote
Old 11-02-05, 05:48 AM   #3
mooklekloon
Senior Member
Thread Starter
 
Join Date: Sep 2005
Location: Toronto, Ontario
Bikes:
Posts: 124
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I followed the park tools website when adjusting the RD,

"Once a too-tight rattle is achieved, turn barrel adjuster 1/4 turn clockwise, to release inner wire tension, and pedal again. Listen and look for signs of scraping or rattling. Continue turning barrel adjuster 1/4 turn clockwise at a time until rattle disappears."

But since everything is so new it is hard to hear the rattle. Maybe the wire tension is a little tight. I will try and loosen it a little and see how it goes. Thanks!

If this doesn't work, I have to head to the LBS this weekend so I will get them to check the crank-bolt torque as I don't have a rench.
mooklekloon 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 01:23 PM.