Man that's really odd. I have been using the 22 gram sliders all along with C1,B2 and A2. I ride between 5400 and 12,000 feet and although for some reason on A2 I can't seem to get to my rev limiter I still hit 64mph at 5400 feet and on C1 and B2 did hit the limiter at 68mph. Yours at only 46mph on B2 with 24 gram sliders makes me think something else might be wrong.