Over the last couple of years I've seen several threads about lowest gears. I even started one myself. A quick search for highest gears didn't give me too much. So how about it? What kinds of highest gears do you have on your machines? 52 X 12s? Please distinguish between commercially available gearing including the Schlumpf system, homebrew using standard parts, and frankenbike creations. All are welcome. I have a 44 X 14 on my commuter bike and know of a nearly 400 gear-inch high on John Howards' Bonneville speed bike.