Originally Posted by DARKSCOPE001

Hello all its been a long time since ive posted here (been off the bike for a while now its time to return)

I have always had problems with my front derailleur namely it keep throwing the chain. Finaly after my last ride with some friends I decided to investigate the matter further. i found that it was way to high above the big ring (about 10mm) and that the tension on the cable was to high and the adjustment screws were out of wack.

Fast forward. Watched a few videos on youtube . I first adjusted the height of the derailleur cage to within 3mm of the top ring highest teeth. put the chain in the lowest gear on the back (biggest cog) adjusted the limit screws on the front so that there was about 1mm of space between the cage and the chain.

Shifted to smallest gear in back. and put the front derailleur into 2nd and adjusted it so that it was also about 1mm from the chain.

On the stand the bike works great I was very happy to see that it was working correctly. So I decided to go for a test ride today before i have to work. with a smile on my face i pushed the right brifter in and waited for the shift......... NOTHING! The chain grabs at the ring and clatters and clacks but will never make the leap even if i hold the brifter in with my hand.

Brought the bike back into the garage and hung it on my stand and proceded to see what the problem was. Again everything is working fine on the stand but out on the street it wont make the leap. I was even soft pedaling it so there was almost no load on the chain and I was keeping the cadance up. I cant think of one reason why it wont shift.

Someone help please.

Before I forget my groupo is shimano 105 but it has a fsa front derailleur (not sure what model but I can find out if someone needs to know) Very frustrating to not have my big ring basically makes this bike forced to be ridden slow.

Thanks
Sean Scott