How To Stop Bike Chain Rubbing On Front Derailleur. The issue Im having is if Im in the 24t CR the chain starts rubbing against the inside of the FD when going to the larger cogs in the rear. Pedal bike slowly and continue to sight gap.
If its rubbing in your 50x12 its probably the high limit screw or a lack of cable tension. Or 2 you may have a barrel adjuster on the cable stop at the top of the downtube. When tension is on the chain it pulls tighter and straighter and the rub goes away.
If the chain is not rubbing on the cage the next think I would do is to measure the chain for excessive wear.
How to make quick on the road cycling adjustment for chain rub or chain drop by adjusting the limiting screws on the front derailleur of your road bike or mo. Chain Rubbing Front Derailleur 1 Put chain on smallest chain-ring and largest cog. This setting is designed to eliminate any chain rub on the inside face of the front derailleur when the bike is in its lowest gear ratio. Bend a little at a time until it looks good.
