A new Shimano 105 Rear derailleur from
Evans Cycles in Cardiff, having broken mine yesterday after falling off while turning round to take a photo. Got too close to the edge of the road, and wheels just slipped down the curve of the tarmac and about 0.5mph.
Originally, didn't think I'd done any damage, as it was still changing OK. Then I changed to the largest sprocket, and the cage caught in the spokes, and snapped the body before I could change back.
Unfortunately, I still have problems after fitting the new one - I'd been having a minor issue with the lever for a couple of months, where occasionally trying to change up (to a smaller sprocket), the lever just flapped without doing anything. But it always worked after flicking it a couple of times, and otherwise was changing fine, so I just ignored it. But I also replaced the cable just now, and cannot get the new one to work right. It doesn't seem to be holding it correctly in the lever. So down to Simon's Cycles with it tomorrow, see if he can do anything - but I suspect a new RH lever will be needed