Go Back  Bike Forums > Bike Forums > Road Cycling
Reload this Page >

chain stretch

Search
Notices
Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

chain stretch

Thread Tools
 
Search this Thread
 
Old 10-28-07, 03:09 PM
  #1  
500 Watts
Thread Starter
 
kill.cactus's Avatar
 
Join Date: Aug 2006
Location: Ann Arbor, MI
Posts: 833

Bikes: Trek 7200 FX ('05), Trek 6000 ('07)

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
chain stretch

The mechanic at my LBS says I have "Quite a bit" of chain stretch.

I know this messes up the cassette, but will it mess up other (more important and expensive) items like the chainrings or derailleur?

Thanks

Edit: I guess the derailleur shouldn't be affected since it is only the replaceable cogs that come into contact with the chain.
kill.cactus is offline  
Old 10-28-07, 03:25 PM
  #2  
cab horn
 
Join Date: Jun 2004
Location: Toronto
Posts: 28,353

Bikes: 1987 Bianchi Campione

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 42 Post(s)
Likes: 0
Liked 25 Times in 18 Posts
You've already crossposted this in the mechs forum.
operator is offline  
Old 10-28-07, 03:28 PM
  #3  
100% USDA certified
 
the beef's Avatar
 
Join Date: Feb 2006
Location: Seattle -> NYC
Posts: 4,023
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 6 Times in 2 Posts
Basically, chain 'stretch' will wear the teeth of your drivetrain parts: chainrings, cogs, and derailleur pulley wheels. It'll also degrade shifting and general drivetrain smoothness.
the beef is offline  
Old 10-28-07, 03:28 PM
  #4  
James
 
Join Date: Jul 2007
Location: Fairfield County, CT
Posts: 484

Bikes: 2005 S-Works Roubaix Ultegra

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
It does the same to the chain rings as it does to the cassette.

How many miles do you have on the chain?
JBS103 is offline  
Old 10-28-07, 03:56 PM
  #5  
this portrait of karma
 
transplant's Avatar
 
Join Date: Aug 2005
Location: chicago
Posts: 1,238
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
"proper" terminology is jockey wheel and they can get to look like below. same as everything else - they'll wear out faster if your chain is worn.

transplant is offline  
Old 10-28-07, 08:36 PM
  #6  
500 Watts
Thread Starter
 
kill.cactus's Avatar
 
Join Date: Aug 2006
Location: Ann Arbor, MI
Posts: 833

Bikes: Trek 7200 FX ('05), Trek 6000 ('07)

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
hm thanks for the info. yeah I kind of cross posted across several forums thinking I wouldn't get too many responses :0

I have about 650 miles on the bike. I'm really not buying that my chain is stretched. Maybe my mechanic was just BSing me...

Although this is a MTB and I find myself mashing a lot...

Thanks for all the info!
kill.cactus is offline  
Old 10-28-07, 09:30 PM
  #7  
# BF-STL-00020
 
marengo's Avatar
 
Join Date: Apr 2006
Location: Austin
Posts: 323

Bikes: Cinelli, Pinarello, Rossin, Gitane, Trek

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Originally Posted by kill.cactus
I'm really not buying that my chain is stretched. Maybe my mechanic was just BSing me...
I can't imagine why you'd use a mechanic you don't trust, but anyway why don't you find out for yourself:

https://cgi.ebay.com/PARK-TOOL-CC-2-B...QQcmdZViewItem
marengo is offline  

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.