I bought a new set of wheels and a new cassette for it. When I put the new wheel w/ the new cassette on my bike, I experience a vibration through the crank and pedals when I'm in the smaller cogs (12-13-14-15).

When I put my old cassette on the new wheels, I do not experience this vibration so it doesn't seem to be an issue with the wheels.

I am using a 5 month old chain that does not have any stretch according to my chain wear tool.

I have also tried adjusting the rear derailleur cable tension but that does not seem to help.

The last thing I could think of adjusting was the b-screw adjustment, but since my b-screw is screwed in backwards, I can't quite use screwdriver to adjust it so instead I just used my hand to move the rear derailleur body closer and farther away from the cassette but that did not get rid of the vibration either.


The only thing I can think of remaining is that my rear derailleur jockey wheels aren't meshing well with the new cassette teeth. My drive train is 3 years old and I have never replaced any part of it besides the chain regularly. Could it just be that my drive train is worn in such that it doesn't work perfectly with a new cassette? My chain does not seem to have any real issues with the exception of the occasional skip when I'm really hammering hard.

Any suggestions?