Correction: undertray/wheel angle
 

Whoops! Serves me right trying to operate away from my resources.I posted that a ten degree angle would be adequate to prevent a ground strike for the front lower portion of a car,as measured from the ground intersection of the front tire tread and a line projecting forward and up.Wrong! According to standard practice,the angle must be at least 16-degrees,or anything below that will be scrubbed off at the first driveway ramp.Sorry!