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

Thread Tools Search this Thread
Old 05-22-12, 03:42 PM   #1
Junior Member
Thread Starter
Join Date: Apr 2011
Posts: 17
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
wobbly right peddal and front gear cogs

Hi all!
I have a problem, that im sure will be quite common but i would like some assistance with.
My right pedal and the cogs wobble both when cycling and staying still, however the left pedal does not. it is annoying as when the cog moves, the chain catches on the front deraileur and changes gear. the cogs are securly attached to the pedal arm and it also sometimes squeeks when being turned.

The bike is a Dawes Ultra Galaxy, (from around 1970s / 80s)

Any ideas?
Many thanks,

Last edited by tburn; 05-22-12 at 03:45 PM.
tburn is offline   Reply With Quote
Old 05-22-12, 04:19 PM   #2
Senior Member
CACycling's Avatar
Join Date: Feb 2008
Location: Oxnard, CA
Bikes: '08 Fuji Roubaix RC; '07 Schwinn Le Tour GS; '92 Diamond Back Ascent EX
Posts: 4,565
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Sounds like the crank arm bolt (nut) is loose. There is probably a dust cap at the center of the crank spider (the thing the chain rings are bolted to). Remove that and there will be a bolt or nut that has worked loose. The problem is, once you've ridden it loose, you've probably damaged the interface between the shaft and the crankset. Try tightening it (put a lot of force on it) and see if it stays.
CACycling is offline   Reply With Quote
Old 05-22-12, 04:35 PM   #3
just pokin' along
desertdork's Avatar
Join Date: Aug 2008
Location: the desert
Posts: 1,082
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
The front gear rings are chainrings. The cogs are the gears in back.

Your description sounds like the drive-side crank arm is loose and wobbling on the bottom bracket spindle. The aluminium crank interface will quickly wear out of square against the harder steel spindle. Once worn enough, the crank arm won't fit securely again, and replacement will be necessary. If yours moves enough to cause the chain to derail, I suspect it's beyond hope.
desertdork is offline   Reply With Quote

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 05:56 PM.

  • Ask a Question
    get answers from real people!
Click to start entering your question.