what
 

is the steepest grade hill/mtn you have ever climbed?

my steepest was a 53% grade...

I climbed a 94.29% with my industrial diamond studded 6.8 tires, i cooked a hamburger on my thighs when i got up to the top of the hill.

I then breathed fire and established a small country in honor of chuck norris who beat me by pedaling with his beard.

how did the whole riding upside down thing work out for you?...

He was too far ahead, i couldnt see.

??

+1

I'm wondering if the OP knows that a 100% grade = 45 degree slope.

Probably not.

...wtf is grade in degrees?

Seriously, grade is great for the road but doesn't imply the impact of off road nearly as well.