Doesn't take much. I was turning around on a gravel road, I rode the quad up the bank a little and it tipped onto it's side. I was going like 1 mile an hour. We flipped it upright. The bumper was bent at like a 15 degree angle. I just pull on it to straighten it out. (should I be able to bend a bumper by hand without tools?)
Another time bumped up against a tree. Again, not going very fast. Bumper was way bent.
Don't get me wrong - I'm glad there's a bumper and it's doing it's job to protect the bike. But I've owned several quads over the years and never had such a weak bumper.
If you look at the DG bumper, you'll see its much beefier. Especially the pro version. And the paint doesn't crack/chip/rust due to these bumpers are aluminum.