Variable gear ratio mechanism variably sets a ratio defining {HEAD ~ a pivot angle} of steered wheels of the vehicle to a steering angle of {TAIL ~ a steering wheel} of the vehicle 
Variable gear ratio mechanism variably sets a ratio defining { HEAD ~ a pivot angle } of steered wheels of the vehicle to a steering angle of { TAIL ~ a steering wheel } of the vehicle
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH