chatterbox

Most recent activity

• Front derailleur chain rub

  in Mechanics & Fixin' • 12 years, 6 months

  

  rive gauche, thanks for the offer and uploading the pic. I have however managed to get a new Shimano Deore LX (T660) top swing FD for really cheap.

  I'm happy to report that I don't get any rubbing in any of the gear combos! And it only took me about 45 minutes to swap and adjust it.

  For anyone interested the new cage is about 19mm at the front and the old Deore cage (FD-M590) is about 17mm. Amazing what 2mm can do.

  Even with the wider cage, it's shifting better than before. It's only really wider towards the opening so it doesn't affect shifting ability.

• Front derailleur chain rub

  in Mechanics & Fixin' • 12 years, 6 months

  

  Thanks rive gauche, were you thinking of selling it?

  I got my bike back from the LBS today and all they did was adjust cable tension so it doesn't rub when on the smallest sprocket at the back, but it now rubs on the 3 biggest sprockets. So we can safely say it isn't possible to not have chain rub on the Shimano Deore in this config.

  I can live with a bit of rub in just the outermost sprockets but this is too much. I'll shop for a wider cage.

• Front derailleur chain rub

  in Mechanics & Fixin' • 12 years, 6 months

  

  I adjusted my wife's mountain bike FD today. She has the Shimano Deore LX as apposed to my Deore. The cage is wider and I was able to adjust it with no rub in any of the gear combos in a matter of minutes. It also has no issues shifting as I know some people said the wider cage won't shift as easily.

  The LX is about 5 years old now so not sure if the new models are still wider. But this might definitely be an option for mine.

• Front derailleur chain rub

  in Mechanics & Fixin' • 12 years, 6 months

  

  Thanks Scilly Suffolk

  rive gauche, it's a Shimano indexed.
  Tripple front and 9 on the rear sprocket.

  I see the cable is at more of an angle at 2 x 9 compared to 2 x 1 which only has a slight angle (1 being the smallest rear sprocket) So could in theory adjust it in such a way that 1 just clears and 9 rubs. Only issue is then 7 and 8 rub as well then.

• Front derailleur chain rub

  in Mechanics & Fixin' • 12 years, 6 months

  

  I've tried 1, 2 and 3mm heights. After spending about 8 hours on this and almost busting my cable, I've decided to book it in for it's first free service. My LBS said it shouldn't rub in those combos so I'll see if they can get it right. If they can't either I might look at another FD.
  I'll read up on cage widening as well.

  Thanks for all your suggestions.

• Front derailleur chain rub

  in Mechanics & Fixin' • 12 years, 6 months

  

  Thanks guys. Even on the middle chainring? I was under the impression cross chaining only applies to the inner and outer chainring on a tripple FD

• Front derailleur chain rub

  in Mechanics & Fixin' • 12 years, 6 months

  

  Thanks hippy, been over parktools plenty of times. Even with barrel adjustment I cannot get the rub to stop on both the small and big sprocket whilst being on the middle chainring. If the one end is clear, the other end will rub heavily. If I make fine adjustments they both still rub.

• Front derailleur chain rub

  in Mechanics & Fixin' • 12 years, 6 months

  

  After exhaustive reading / watching youtube clips and spending hours trying to adjust the FD I'm about to give up.

  The problem is that chain rub occurs when I'm in the middle chainring and either the smallest or largest rear sprocket. It actually starts to rub slightly on the gear just before that. When adjusting cable tension i can get it to stop rubbing on either the smallest or largest sprocket but not both. Is the FD cage too narrow? It's perfectly parallel and I've tried different heights. It shifts perfectly fine. I'll be happy to buy a wider cage if that will sort the issue.

  Many thanks