Now I've always been told that you should relieve pressure when changing gears with a derailleur set up, but I've been really struggling round Durham, the city of seven hills, if I ease up, I need to change gear again immediately and eventually I run out of gears and grind to a standstill. Aaaaargh!!!!!! Where am I going wrong ? If anyone knows Durham, they are steep hills, never used to have a problem in Redditch !!