The diagram below shows a vehicle with wheels turned to the steering lock position. This results in the minimum centerline turning radius.

The formula shows how to calculate the steering lock angle for a vehicle, given the minimum centerline turning radius.

Minimum Turn Radius

Legend

WB	Wheelbase
RF	Minimum Centerline Turning Radius (forward)
RR	Minimum Centerline Turning Radius (reverse)
SA	Steering Lock Angle

Formulas for calculating the steering lock angle from the given radii:

SA = arcsin (WB/RF)

OR

SA = arctan (WB/RR)