I recently got my drive-train replaced on my old mountain bike, which I use for everything. IMG_3879 (2).jpg
I changed the cassette to a 9-speed from a 7-speed, while maintaining a friction shifter. I never had issues shifting through seven gears with a friction shifter, so I just assumed it would be fine with a 9-speed cassette. I told the bike shop that this is what I want to do, and they said okay, that should work.
Problem is, it has a lot of issues with ghost shifting, primarily when I would shift to a lower gear, as the derailer is high-normal. The guy at the bike shop told me the screw on the side of the shifter can be tightened to make it more difficult for the derailer to shift on its own. This helped to an extent.
Question is, am I right to be pissed about the bike shop not telling me this could be an issue? It seems they would have known that using a friction shifter designed for 5 gears on a 9-speed cassette could cause issues. I'm currently thinking about changing back to a 7-speed cassette, as I had no shifting issues prior to going nine-speed. I'd rather not go with index shifters for financial and simplicity reasons, but mostly financial.