vert ramp radius?
 

Can you guys tell me what's the avarage radius and how much vert of a typical vert ramp? bmxtrix.com autocad plans said 300 cm (10ft) isn't that too much? I can't go to the skatepark and measure it because there arn't any in my country. Thanks.

10 foot tranny, with two feet of vert, and 16 feet of flatbottom is pretty much the standard for a competition ramp, at least three or four years ago.

Also bear in mind that ramps at skateparks are designed for skateboards and the trannies can be uncomfortably short and abrupt on a bike. If you're building your own, err on the side of longer transition.

On a vert ramp, it doesn't matter that much, because the trannies are so big in the first place (assuming you're not doing a crazy miniramp with vert and oververt portions).