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.

Cog wear

Old 11-22-02, 11:49 AM
  #1  
Sailguy
Bring It!
Thread Starter
 
Sailguy's Avatar
 
Join Date: Oct 2002
Location: Bay Area, CA
Posts: 611

Bikes: Torelli - Trek 520 - GT - and some old Schwinn Thing

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Cog wear

After doing more reading on bicycle maintenence, I have learned that typically a chain will only last 1500-2000 miles or so. I know that I have put about 2500 miles on my chain, and I bought the bike used, so I am not sure how many miles were on it beforehand.

In reading that a streched chain can cause cog wear, I am curious what things I need to look for to determine if I need to replace my casette. I am going to buy a new chain this weekend so I can track actual miles on it and keep on the safe side. But I have not seen or read any good descriptions of how to tell if/when the cog wear warrants replacement.
__________________
Sailing and Cycling make the world go 'round. Quietly Too!
Sailguy is offline  
Old 11-22-02, 12:09 PM
  #2  
P. B. Walker
Breaker of Spokes
 
P. B. Walker's Avatar
 
Join Date: Aug 2002
Location: N. Virginia
Posts: 493
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
From what I've heard you want to look for a couple of things. This is just what I've read and heard. So don't take it as the gospel.

- If the teeth are ground down to sharp points then it's time to replace.

- If you see teeth missing or cut off at the base, then it's time to replace.

- If you clean it really well and check for cracks in each of the cogs.

- If you see teeth that are twisted or warped. Teeth should be flat, like the tip of a regular screwdriver. Sometimes you'll see slightly twisted tips on the teeth. That's bad.


That's my two cents... hope it helps.

PBW
P. B. Walker is offline  
Old 11-22-02, 12:50 PM
  #3  
Rotifer
WallaWalla!
 
Rotifer's Avatar
 
Join Date: May 2002
Location: Walla Walla, WA
Posts: 823
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
If you end up sprawled on the pavement when sprinting away from a stoplight - time to replace your cassette or rings.
__________________
Jeff
Rotifer is offline  
Old 11-22-02, 12:52 PM
  #4  
pokey
Senior Member
 
Join Date: Jun 2002
Posts: 1,372
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally posted by Sailguy
After doing more reading on bicycle maintenence, I have learned that typically a chain will only last 1500-2000 miles or so. I know that I have put about 2500 miles on my chain, and I bought the bike used, so I am not sure how many miles were on it beforehand.

In reading that a streched chain can cause cog wear, I am curious what things I need to look for to determine if I need to replace my casette. I am going to buy a new chain this weekend so I can track actual miles on it and keep on the safe side. But I have not seen or read any good descriptions of how to tell if/when the cog wear warrants replacement.
That mileage figure is stinky applesauce.If a new chain skips teeth on an old cassette,the cassette or at least the cog where the teeth are being skipped is worn out. If things are working ok now,It's ok.Learn to measure a chain so you don't throw money away.A foot of chain measures exactly 12" when a used chain measures 12 1/16" C-C of pins it's time to replace it.
pokey is offline  
Old 11-22-02, 12:54 PM
  #5  
pokey
Senior Member
 
Join Date: Jun 2002
Posts: 1,372
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally posted by P. B. Walker
From what I've heard you want to look for a couple of things. This is just what I've read and heard. So don't take it as the gospel.

-

- If you see teeth missing or cut off at the base, then it's time to replace.



- If you see teeth that are twisted or warped.


That's my two cents... hope it helps.

PBW
Teeth on uniglide cogs look like this when brand new. Easy test.If chains skips cogs it's trash.
pokey is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Gary Fountain
Classic & Vintage
16
07-02-11 09:44 PM
iforgotmename
Touring
1
02-13-11 01:49 PM
Machka
Road Cycling
6
12-23-10 03:56 AM
mzeffex
"The 33"-Road Bike Racing
0
01-13-10 08:15 PM

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


Thread Tools
Search this Thread

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

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.