I've been reading road.cc for a while and thought it was about time a joined the forum especially as i have an issue i can't figure out.
I've recently started to get some chain slip after i change gear and was hoping for some opinions on what could be the cause. The chain doesn't actually slip as i change gear it happens later mainly when a have a cheeky rest and then start pedalling again. It won't do it again until until i change gear and seems to happen in the big or small chain ring at the front. The rear cassette has just under 1000 miles on it and the chain has just been changed (did it on the old chain as well). The gears index fine with no real hesitation.
The only thing i can thing of is maybe gear cable tension but i would have thought i would have problems when changing gear with hesitation. Any ideas i what i should check? Oh it's ultegra 20 speed.