My dad has just purchased an old Kettler 6 speed bike. It seems in good nick apart from when changing gears under load the chain seems to fall off the guide pulley.
The teeth are worn a little but not excessively what should I look at to stop this happening?
Could the chain be too loose? or the derailleur bent slightly? Any ideas, starting points appreciated.
The teeth are worn a little but not excessively what should I look at to stop this happening?
Could the chain be too loose? or the derailleur bent slightly? Any ideas, starting points appreciated.