Originally Posted by
dabac
If the top pulley doesn't clear the sprocket, turn the B-screw in. Some setups may requre replacing the B-screw with a longer one. Any with the correct thread will do. Another option is to take the screw out entirely, and thread it back in reverse. The head will act as extra length.
Adjust the B-screw for clearance while on the biggest cog, then check it across the cassette; on occasion it will need to be readjusted to clear all of the cogs. This will often occur in a situation like yours where a cassette with a wider range is fitted. The cage moves down and over at an angle optimized for a certain cassette tooth range and a different range may necessitate a different adjustment to clear.