When I first changed mine to B2 with just the tire change, it was too much. It felt like the ratio was too low for the weight..kinda like the feeling you get from going from a 3:50/1 rear end to a 4:10. So I changed it to C1 which was perfect, like the feeling of dropping to a 3:73 from 3:50. After adding the extra 80lbs of skid plates and doors it was sluggish so I went back to B1. That helped a lot but the extra weight is noticeable. I use a 22gram slider because of my elevation. They help plant the RPMs better in the power band.