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Need help on ajusting my front derailleur.

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Need help on ajusting my front derailleur.

Old 08-16-09, 12:40 AM
  #1  
jjbod1
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Need help on ajusting my front derailleur.

My path bike and/or spare mtn bike is a 75% close to rebuilt 96 Fisher HKEK. In the rear I have a Deore rear derailleur, and 8 speed upgraded from 7. In the front I still have the org crankset and STX front derailleur. My problem is, that when I am in the front middle ring, then shift from 5 to 6 on the rear, the chain starts rubbing the front derailleur. I know I wont be able to use all 8 gears from the middle ring, but I would like to be able to use gear 6 if possible. I am a idiot when it comes to adjusting derailleur's, but I am guessing this is a easy fix. Can someone tell me what to do?

Down the road I have a 07 Deore front derailleur that will be installed on the bike, but before I take it to the shop, to have that done, I would like to fix this current prob myself.
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Old 08-16-09, 01:48 AM
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Use the barrel adjuster at the shifter. You can do that while you're riding. Adjust it a bit, then shift out of the middle ring and back. If the rubbing gets worse, adjust it the other way.
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Old 08-16-09, 02:08 AM
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You should not have any chain rub when you are running off the middle ring and like the Captain said... you might need to make a fine adjustment at the shifter to get the derailer to clear the chain.

The adjuster will need to be backed out to increase cable tension as this will move the derailer outboard a little more.

Do make sure you derailer is properly aligned with the chain rings and is set at a proper height.
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Old 08-16-09, 02:10 AM
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Panthers007
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The best way to adjust a front-derailleur is to start from scratch. Trying to adjust an already installed FD is generally an extremely frustrating journey. Which doesn't work. So the following is my 'cut & paste' instructions for all-problems-FD:
_____________________________________________________________________________________

Take the cable off the FD. Now install it from scratch as per Park Tool Repair:

https://www.parktool.com/repair/readhowto.asp?id=75

And BicycleTutor:

https://bicycletutor.com/adjust-front-derailer/

When you have it properly trimmed and are ready for the cable - a new one wouldn't hurt - you want to pull the cable taut - not too tight, taut. Then apply 48 to 60 inch-pounds to the pinch-bolt. Then put it through it's paces.

It's always easier and faster to install a FD from square-one, than it is to make adjustments with it already attached. This tends to fix one thing - while throwing another out of kilter. Start fresh. You'll get it.

Adding a barrel-adjuster can solve many problems with the cable coming loose - or being too tight.




<EDIT> I feel like I'm being stalked...
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Old 08-17-09, 12:11 AM
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Thanks!! I got it to a point where its not to bad. but to get it not to rub at all, it then wont shift right. I can deal with it the way it works now, but i am wondering if the old Front der, is to outdated for the 8 speed rear.
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