I've had a similar one in my bikebox for several years, got on Ebay. Marked "Advent". Think it was made by Alsop, the people who marketed that beam-style rear suspension. Never figured out how to mount it without affecting the fold. I'd really like to try it, any ideas?
I shore ain't no in-gin-ear but I suspect this is less likely to cause an endo than a suspension fork. This would be a 2nd fulcrum (the first is the front wheel axle) that is further up the load arm than a fork is. So the higher moment of rotation would make the the lever arm shorter, and the rotational force less. In other words the fork dips you down (and forward if more of your weight is in front of the fork) at level of the the knees, the handlebar dips you down and forward at the level of the chest. If they both dip you're probably screwed.
Suspension or not the trick is to keep your weight behind the moment of rotation. So you can lean over the bars going uphill, but not so much going downhill.
Anyway, endos can be fun. Just remember to duck before your face hits the dirt.
Last edited by Brimstone; 05-21-10 at 11:22 AM.