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