Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Cable tension?

Search
Notices
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.

Cable tension?

Thread Tools
 
Search this Thread
 
Old 08-05-03, 07:13 AM
  #1  
Junior Member
Thread Starter
 
Join Date: Aug 2002
Location: Knoxville, TN
Posts: 15
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Cable tension?

When in the inside chain ring should the front derailleur cable
be a little sloppy, (have a triple) and when you shift to the
largest chain ring the cable is tight? I was having a hard time
getting my bike to shift up to the outer chainring, so I started
adjusting the high & low set screws as well as the cable. I finally
got it to work but just wondering if this is correct. Thanks
Brandt is offline  
Old 08-05-03, 07:35 AM
  #2  
Senior Member
 
Join Date: Feb 2002
Location: St. Paul, MN, USA
Posts: 98
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Set cable tension last when adjusting a front dertailleur. See Front Derailleur Adjustment
Calvin Jones is offline  
Old 08-05-03, 10:05 AM
  #3  
hello
 
roadfix's Avatar
 
Join Date: May 2003
Location: Los Angeles
Posts: 18,695
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 193 Post(s)
Liked 116 Times in 52 Posts
General rule.....there should never be any cable slack.....
roadfix is offline  
Old 08-05-03, 10:24 AM
  #4  
Senior Member
 
Join Date: Mar 2000
Location: Parrish, FL
Posts: 7,963

Bikes: Lots

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Without touching, feeling, seeing your problem, it's purely speculation, but sounds like you have too much slack in your cable or your "H" limit screw is too far in.

Here's what I would do.

First check to see that your front derailleur (FD) is straight. While looking down from above, the outside plate should be parrallel with the large chainring. Then, while looking at the cranks from the side, there should be a 1 -2 mm gap between the top teeth of the big ring and the bottom of the outer plate of the FD.

Then, shift into the granny gear and the biggest cog in the back. This will put your chain in the innermost position. Check your inside stop. The chain should barely miss the inside plate of the derailleur. Adjust your "L" stop on the front derailleur until it doesn't make noise while pedaling.

Then, make sure your barrel adjusters are turned all the way in, then back it out 1 full turn. The barrel adjusters on a road bike for the front shift cable are either an in-line adjuster or mounted at the cable stop on the frame near the headtube. Loosen the cable fixing nut and pull the slack out of the cable. Don't pull it too tightly, just enough to get the slack out of it. Tighten it down.

Then shift into the large chainring, and the small cog. This will put the chain in the furthest out bound postion. Now adjust the "H" stop on the front derailleur where the outside plate doesn't scrape the chain while pedaling. I leave a bit more gap on the upper limit adjustment. Like a full 1 mm gap. (width of a penny). If you don't you may get some scraping while pedaling hard due to frame flex or crank flex.

Now, shift into the middle ring. Play with the barrel adjuster to center the front derailleur. I do this by shifting into the smallest cog in the rear, and adjust with the barrel adj so it doesn't scrape. Then I shift into the biggest cog in the rear and adj. AGAIN to where it doesn't scrape. At this point you are making very small turns of the barrel adjuster. With 9-speed systems, you should be able to center the cage so it doesn't make any scraping in the middle chainring. (or minimal) Then, shift through all gear combo's to double check everything!

Good Luck.

L8R
__________________
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming, "WOW, What a Ride!" - unknown
"Your Bike Sucks" - Sky Yaeger
a2psyklnut 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.