which parameters would i need to know to find the calculations of a bike jumping a ramp?

Question

Velocity, mass, angle, acceleration, ect....

Answer 1

Important factors:

1) Spring constant of bicycle's tires and, if applicable, suspension.
2) Location of the bike-rider system's center of mass, relative to the tires.
3) Velocity at which the bike approaches the ramp.
4) Size of bike's tires.
5) Distance between the bike's tires (wheel base).
6) An exact description of the ramp's shape.
7) Gravitational strength.

Doing a realistic analysis of the trajectory is certainly possible, especially if the rider is rigidly fixed to the bike, and the bike has no suspension. However, it is still a messy, non-linear problem, so numerical techniques would be much preferred to analytical ones.