slotmachine lots of it is just practice. You don't need to gear up, you just need to get better at spinning and the way to do that is by riding down more hills. I ride a 69" gear and never bounce anymore, even on steep long descents. My hillclimb teammate rides a 65 inch gear, I see him spinning like an insane hamster on the way down (up to 160 rpms) but never bouncing.