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 08-09-10, 09:39 PM   #1
Thread Starter
Join Date: Nov 2007
Posts: 29
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Dura Ace 7900 chain / chainring noise

I previously posted re noise with the new, improved, quieter Dura Ace drive train. I have 50 / 34 chainrings and 12 / 27 cassette. The 7900 chain is installed correctly without the original "master link" and I have no front derailleur contact in any chainring / rear cog combination and the chainline measures out to be as specified by Shimano. What I do have in the 50T front and 21,24, and 27T rear combination; yes crosschaining, is chain / chainring noise . It appers that the 7900 chain sideplates are contacting the sides of the chainring teeth at the top and bottom causing an annoying "rattle"Noise is more prominent as crank rpm increases. Is this common on new improved 7900 series as I have exactly the same chainring / cassette in 7800 series with no noise, even in these crosschain combinations. Any suggestions? Thanks
IGD is offline   Reply With Quote
Old 08-09-10, 10:13 PM   #2
cab horn
Join Date: Jun 2004
Location: Toronto
Bikes: 1987 Bianchi Campione
Posts: 28,321
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
I have a 7900 equipped bike and the issue is the same - it is a much noisier drivetrain EVEN with proper lubrication. Haven't had time to fully investigate this issue yet, but different lube doesn't make any difference. Purple extreme, triflow, Pedros - no difference.

Brand new 7900 with a standard crankset and a 12-25 I believe.
operator 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 05:57 AM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.
  • Ask a Question
    get answers from real people!
Click to start entering your question.