UnclePete
Retro Newbie
Chaps, your expertise on this one is appreciated.
I have Campy Veloce 9-speed shifters on my Colnago Superissimo. The RH / rear derailer shifting has become problematic recently. Using the thumb lever for up shifts, the derailer shifts happily from the largest to the smallest cogs with clear, crisp clicks. Shifting from small to large, however, is very hit and miss, specifically in the first four cogs. Pushing the lever will not move the derailer enough to change gear, but then it will shift two gears with one push. I've been managing this by shifting to a gear higher than I need and then dropping the chain back down with the thumb lever, but this is not a long-term solution, obviously.
The gear cable and gear housing are both new and clean and moving smoothly. The derailer itself is tip top. I've opened up the shifter, cleaned everything, relubed and reassembled, but the problem persists. The G springs, which engage the ratchet, seem to be fine (no obvious wear or damage), and the spring carrier post is still strong and true. The ratchet itself seems a touch worn on the first three teeth - nothing major, but slightly flatter across the tops than the others. You can see this clearly in the attached pic.
Since the G springs engage with the valleys and not the peaks, I'm not convinced that the wear on the ratchet teeth is the issue, but I can't think what else might be causing the poor shifting.
Any advice or suggestions are most welcome!
I have Campy Veloce 9-speed shifters on my Colnago Superissimo. The RH / rear derailer shifting has become problematic recently. Using the thumb lever for up shifts, the derailer shifts happily from the largest to the smallest cogs with clear, crisp clicks. Shifting from small to large, however, is very hit and miss, specifically in the first four cogs. Pushing the lever will not move the derailer enough to change gear, but then it will shift two gears with one push. I've been managing this by shifting to a gear higher than I need and then dropping the chain back down with the thumb lever, but this is not a long-term solution, obviously.
The gear cable and gear housing are both new and clean and moving smoothly. The derailer itself is tip top. I've opened up the shifter, cleaned everything, relubed and reassembled, but the problem persists. The G springs, which engage the ratchet, seem to be fine (no obvious wear or damage), and the spring carrier post is still strong and true. The ratchet itself seems a touch worn on the first three teeth - nothing major, but slightly flatter across the tops than the others. You can see this clearly in the attached pic.
Since the G springs engage with the valleys and not the peaks, I'm not convinced that the wear on the ratchet teeth is the issue, but I can't think what else might be causing the poor shifting.
Any advice or suggestions are most welcome!
