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 04-04-01, 09:02 PM   #1
mrbonedog
Newbie
Thread Starter
 
Join Date: Apr 2001
Location: Buffalo NY
Bikes:
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I am new to this forum and hope I can get some help. I just finished building myself a K2 Animal (98 frame) with mostly new components but I re-used my old shimano 7sp drivetrain (ran out of cash). The drivetrain has 4 seasons on it. I did replace the chain with a new shimano IG chain. The original chain was an IG also. On the stand, everything runs perfectly smooth, as well as on the street, as long as there is moderate to no load. As soon as I apply some heavy torque, the chain skips at the back end. The chain doesn't appear to be coming off the cog at either side. It almost looks as though it is literally skipping a tooth. I can get this to happen on the 11, 13, 15, & 18t cogs. I didn' t try on the bigger ones, I would need to be on the trail (or at least a hill) to maintain any torque. I would greatly appreciate any help.
mrbonedog is offline   Reply With Quote
Old 04-04-01, 09:22 PM   #2
fubar5
0^0
 
fubar5's Avatar
 
Join Date: Feb 2001
Location: Rolla, MO
Bikes: Redline Monocog,Surly Crosscheck, Lemond Reno
Posts: 4,056
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I have somewhat the same problem, but I can see it is the cassette, did you put the old cassette on there?
fubar5 is offline   Reply With Quote
Old 04-05-01, 12:32 AM   #3
pat5319
Senior Member
 
pat5319's Avatar
 
Join Date: Sep 2000
Location: Spokane WA
Bikes: Seven Axiom Ti, Trek 620, Masi cylocross (steel). Masi Souleville 8spd, Fat Chance Mtn (steel), Scwinn Triple Bar cruiser, Mazi Speciale Fix/single, Scwinn Typhonn
Posts: 1,141
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
You've probably worn the cogs on the old cassette, most likely from using your chains too long before replacment The bushings in the chain will wear after 500 to 2,000 miles changing the distance from link to link, (stretching). When this happens the links put more pressure on fewer and fewer links because the contact points are no longer fully engaged, wearing the cogs. Your favorite gears are always the ones to go first because you use them more. The wear can be noted by either a slightly widened area were the chain contacts the cog under pressure and by the cog taking a "saw tooth" or "sharkfin" shape. Park tools makes some gauges to measure your cogs and chains for wear so you can replace them before they're worn enough to cause damage, you can measure the chain with a ruler , but it is a pain in the a** to do. If you stay on top of the chain measurement/wear the cogs will last for a very long time. If you go for the gauges get the chain gauge first, for most people it's the most useful.

You chain-rings can/will suffer the same damage as the cogs but luckily not as often as there are more of them to spread the load
pat5319 is offline   Reply With Quote
Old 04-05-01, 01:16 AM   #4
Hunter
NOT a weight weenie
 
Hunter's Avatar
 
Join Date: Dec 2000
Bikes:
Posts: 1,762
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I agree with Pat you need to replace your cassette. Anytime you replace your chain say after a year or two plan on doing the cassette as well.
Hunter is offline   Reply With Quote
Old 04-05-01, 06:48 AM   #5
riderx
BFSSFG old timer
 
riderx's Avatar
 
Join Date: Apr 2001
Location: Fredrock
Bikes:
Posts: 1,913
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
agree it's probably the cassette. I replace my chain about 3 times a year. It greatly extends the life of the Chainrings and cassette which are much more expensive. Depending on your amount of riding you may have to do it less frequently.
riderx 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 05:48 PM.