Apologies for sullying the board by both referring to distinctly non-WW parts and indeed the dreaded 2007(ish) vintage Campag QS shifters. The bike, other than the grouppo, is pretty light though!
Given the decent weather here in the UK, I've finally brought my road-bike out of storage and packed away my heavy old cross bike. Very annoyingly, I had forgotten that the road-bike had developed some 'interesting' shifting issues just before I put it away and these don't seem to have magically rectified themselves
The drivetrain consists of a new 10 speed SRAM chain with a fairly worn 10 speed Veloce cassette and compact chainset. This is skipping a bit but I don't think is contributing to the main problem.
Whenever I shift up a gear (i.e. to a smaller sprocket) on the back the derailleur moves the chain between one and foursprockets. The cables are fairly new and don't seem to be jamming and slipping, instead it seems to be that something is wrong with the ratchet mechanism in the shifter. The number of shifts seems to be roughly inversely proportional to how hard I'm pushing if that makes sense? If I'm really hammering it it'll only shift one or two gears but if I'm just turning the pedals on the workstand it'll go from gear one to gear five to gear nine in two jumps. The same does not happen the other way. Downshifts are one at a time.
Now, leaving aside that this makes for quite an amusing training aid (I want to go easy, the bike wants me to ATTACK NOW!) it's distinctly sub-optimal from a riding to work perspective.
Has anyone else experienced this? Do you know if it's a case of being able to replace the ratchet or have I earned an excuse to buy myself a new groupset?
Many thanks in advance for any help!
All the best,