I think I'll probably need to visit the local bike shop for this one, but thought I'd seek some advice here first from any experienced maintenance gurus who happent o be reading. I ride a 2008 model Specialized Roubaix, with Shimano 105 shifters & mechs and FSA chainset. I recently bought Planet-X Model B wheels. Riding back to London from Brighton after the March FNRttC, one of the rear non-drive side spokes snapped, fell into the chain and got dragged around the cassette and into the rear mech where it bent the arm holding the tension pulley out of shape. The wheel stopped turning, I couldn't move the cranks and the ride was prematurely over. I've just had the wheel back from Planet-X who repaired it without charge. I also bought a new Ultegra 6700 rear mech to replace the broken 105 - this should be compatible with my 105 shifter as they are both Shimano and both 10 speed (Shimano parts are interchangable). I attached the new mech and adjusted the right-limit screw to line up with the smallest cog. I connected the cable and tried shifting to the largest cog to adjust the left-limit screw. However, three clicks on the shifter didn't seem to pull the cable and the derailleur didn't move. I felt some pull on the cable after the fourth click and on the fifth I got a little derailleur movement but by the time I'd clicked as far as I could I was only half way up the cassette. So my first question is: Does the fact that I'm getting no pull on the cable for the first few clicks indicate that the shifter is damaged? My inital thoughts were tha the cable was not tight enough to begin with, so I reattached it a bit tighter and tried again, but no luck. I kept trying, experimenting with B-screw adjustments and cable tension. Eventually the cable snapped at the shifter end which ended my work for the evening. Anyway, now that the cable has snapped, the shifter will only move three clicks in either direction. So my second question is: Should a dual brake/shift lever click right through ten times in either direction when not pulling against anything, or should there be no clicks at all? Any tips would be most welcome. I haven't much experience with derailleur installation, but I'm pretty sure I've followed the instructions correctly. The bike will probably end up in the shop now, but I'd love to hear from anyone who might understand what my problem is.