Thread: Chain rubbing
View Single Post
Old 09-06-16 | 06:14 PM
  #29  
trailflow1
Senior Member
 
Joined: Jan 2015
Posts: 443
Likes: 23
You'll need to start again from scratch to follow my guide. I am saying you'll need to add more cable tension to get the small ring trim to work.

Start over.

1. Unhook the cable. Screw the barrel adjuster fully in. Then back it off a turn.
Shift the RD onto the smallest cog (highest gear).
Unwind the high limit screw 1 full turn.
Down click the left shifter into its lowest position. So press the small lever 4 times

2. Set the height of the FD 2-5mm above the big chain ring. And align the FD so the outer cage is parallel to the chainring.

3. (with the cable still unhooked) Turn the low limit screw on the FD (the screw closest to the frame) inwards fully until the outer side of the FD cage is positioned inline with the big chainring teeth.

4. Pull the cable semi tight and clamp the cable.

5. Shift the rear derailleur into the largest cog on the cassette. (easiest gear)

6. Unwind the low limit screw until the inner side (plastic plate) of the FD cage no longer touches the chain and the gap is around 1mm or less.

7. Shift the rear derailleur onto the smalllest cog (highest gear).

8. Next shift up to the big ring. And then adjust the high limit screw accordingly so the gap between the outer cage is also around 1mm or less

Now go through all the gears while on the big ring and see how many cogs you can click onto without rub.

Then shift onto the small front ring and check the small ring trim is working (press the big lever half a click) and is moving the FD cage when it is clicked. Check the gap so it clears the chain while in the 8,9,10,11 cog. If the trim doesn't move the cage far enough or it doesn't feel very positive to click. Dis-engage the trim (press the small lever) and add some more tension with the barrel adjuster and re-try the trim.


EDIT: Another thing. The FD has a cable tab converter. Depending which angle the cable comes from,from the bb, the converter needs to be ON or OFF. a plastic guide tool should have been included with the groupset or bike to help determine the angle. Dont worry if you do not have the tool it's not absolutely necessary. So you may be need to experiment with the converter tab. Try the ON position first. If you feel the shifting action could be snappier. Start over and try the OFF position. You'll know immediately which is better.

Last edited by trailflow1; 09-07-16 at 08:56 AM.
trailflow1 is offline  
Reply