I just bought a stealthy 12oz flywheel weight for the CR, can't wait to hit some trails. I just have to wait a few weeks for the snow to melt. I was out a couple of weeks ago and my buddy just installed a 16oz fww on his CR. He said it was un-believable. Some of the trails that I was having trouble with, he would just go right up without a problem. And we have about the same riding ability.