Shimano 105 5800 not enough trim

[eospro]

Hi All

I am having dramas with my front 105 5800 derailleur. When on the small chainring and the 3-4 large cogs the chain rubs on the inside side of the cage. I took it to my LBS and they made a few adjustments and told me I had to use the trimming feature to stop the rubbing. When having a test at home I can trim the derailleur a little bit, but it is not enough to stop the rubbing. so I thought to adjust it myself (not a good idea, but I just wanted things to work). After setting the high- low screws and cable tension I could stop the rubbing on the cage while on the small chainring, but it wouldn't shift onto the large chainring. So using the barrel adjuster I adjusted so that I could shift onto the large chainring, but now the chain rubs on the small chainring again and no amount of trimming stops the rub.

So, after making a complete mess of things I went off off to a different bike shop for another adjustment. They tell me everything was out of wack and its now ok and I need to use the trims to stop any rubbing. All nice and happy off home I go and guess what, it still rubs on the small chainring. Am I missing the complete obvious or is something wrong happening here. Two adjustments from two bike shops and they both give the bike back to me saying all is ok and to use the trims to stop rubbing.

1 frustrated Brad

 

[Cycleops]

Does seem to be quite a common problem. Found this which may help:
'

FWIW, installed a 6800 FD for the first time recently and discovered what to do when the cable runs EXACTLY down the middle of that tool that you use to determine how the cable is attached. According to Shimano, attaching with the converter on or off should work but neither did. Had a significant amount of the chain rub in top gear no matter what I did. Figured the ‘solution’ was to increase the range that the cage moves somehow to have more room to play with the trim. Decided to position the converter pin to the right (Off position I think) and then attach the cable to the far right on the outside of the pin and up to the bolt. Thus, the lever arm is shortened slightly and the cage swings a little farther out… voila, no more rubbing. Shimano doesn’t say anything about this option in its instructions but it works. =)'

 

[eospro]

Thanks for that, Bike is back to my LBS after i spoke to them today, but I shall have a look at that.

 

[Vassago]

Hi All

I am having dramas with my front 105 5800 derailleur. When on the small chainring and the 3-4 large cogs the chain rubs on the inside side of the cage. I took it to my LBS and they made a few adjustments and told me I had to use the trimming feature to stop the rubbing. When having a test at home I can trim the derailleur a little bit, but it is not enough to stop the rubbing. so I thought to adjust it myself (not a good idea, but I just wanted things to work). After setting the high- low screws and cable tension I could stop the rubbing on the cage while on the small chainring, but it wouldn't shift onto the large chainring. So using the barrel adjuster I adjusted so that I could shift onto the large chainring, but now the chain rubs on the small chainring again and no amount of trimming stops the rub.

So, after making a complete mess of things I went off off to a different bike shop for another adjustment. They tell me everything was out of wack and its now ok and I need to use the trims to stop any rubbing. All nice and happy off home I go and guess what, it still rubs on the small chainring. Am I missing the complete obvious or is something wrong happening here. Two adjustments from two bike shops and they both give the bike back to me saying all is ok and to use the trims to stop rubbing.

1 frustrated Brad

Find a Bike Specialist who'll fit your Bike while you ride, allowing them to see your motions and hopefully solve your dilemma, KEEP PUSHING....I'm in Atlanta I know a Specialist who's a great Geometric adjuster if your interested I'll send you his Bike Shop information..

 

[eospro]

Atlanta. Great, I should be able to pop in tomorrow, only 15,000km

 

[Ajax Bay]

Find a Bike Specialist who'll fit your Bike while you ride, allowing them to see your motions and hopefully solve your dilemma, KEEP PUSHING....I'm in Atlanta I know a Specialist who's a great Geometric adjuster

This thread's about front derailleur trimming/adjustment! How will a 'bike fit' "solve [his/her] dilemma"? What is a 'Geometric adjuster'? Is the 'Geometric Adjuster' a Specialist (as in bike make) or a specialist?
to Cycle Chat.

 

[fossyant]

watching this new member

 

[SpokeyDokey]

Hi All

I am having dramas with my front 105 5800 derailleur. When on the small chainring and the 3-4 large cogs the chain rubs on the inside side of the cage. I took it to my LBS and they made a few adjustments and told me I had to use the trimming feature to stop the rubbing. When having a test at home I can trim the derailleur a little bit, but it is not enough to stop the rubbing. so I thought to adjust it myself (not a good idea, but I just wanted things to work). After setting the high- low screws and cable tension I could stop the rubbing on the cage while on the small chainring, but it wouldn't shift onto the large chainring. So using the barrel adjuster I adjusted so that I could shift onto the large chainring, but now the chain rubs on the small chainring again and no amount of trimming stops the rub.

So, after making a complete mess of things I went off off to a different bike shop for another adjustment. They tell me everything was out of wack and its now ok and I need to use the trims to stop any rubbing. All nice and happy off home I go and guess what, it still rubs on the small chainring. Am I missing the complete obvious or is something wrong happening here. Two adjustments from two bike shops and they both give the bike back to me saying all is ok and to use the trims to stop rubbing.

1 frustrated Brad

@eospro

You do know that there are two trim settings on the 5800 FD?

When changing down from the large ring to small ring you still have one further (inward) trim available - flip the small lever again after down-changing to activate.

Very different mech' to previous iterations of 105.

Other than that these mech's need heaps of tension to make them operate correctly. Presume you have an inline barrel adjuster to help fine tune this?

Here's the dealer manual for the 5800 FD (be patient while it loads!):

http://si.shimano.com/pdfs/dm/DM-FD0002-05-ENG.pdf

 

[eospro]

I appear to have 2 trim settings with the small lever, each time the derailleur moves inwards a little, but still not enough to stop the rubbing. I'm waiting for the new cables to stretch a bit more before the bike goes back to my LBS to hopefully get this sorted once and for all.