Front derailleur shifting problem

[dventura]

Hi - my bike won't shift into the big chain ring up front when in the 4 or 5 biggest cogs in the back. In the smaller cogs in back, it shifts ok up front. Any thoughts or suggestions as to what's going on, and how to fix, would be greatly appreciated.

Thanks!

[nfmisso]

(12-26-2016, 08:16 PM)dventura Wrote:  Hi - my bike won't shift into the big chain ring up front when in the 4 or 5 biggest cogs in the back. In the smaller cogs in back, it shifts ok up front. Any thoughts or suggestions as to what's going on, and how to fix, would be greatly appreciated.

Thanks!

The FD 'H' adjustment screw probably needs less than 1/4 turn loosening.  Too much and the chain will come off.