DRIVING A 2003 FORD F-150, LARIAT, SUPER CREW, GOING APPROXIMATELY 40 MPH AND ACCELERATING, ON THE ON-RAMP ENTRANCE TO CA STATE ROUTE 108, FROM STANDARD ROAD IN SONORA, CA, ON JULY-3-2019, THE WHEELS LOCKED AND THEIR WAS A LOSS OF STEERING. THE TIME WAS APPROXIMATELY 11 AM, ROAD WAS DRY, FAIR SKIES, NO DEBRIS OR OBSTACLES ON ROADWAY. THE ROAD WAS IN GOOD CONDITION. ONE WEEK EARLIER REPLACED ALL TIRES AT BIG O TIRES, SONORA, CA; THE WHEEL ALIGNMENT WAS CORRECTED AT THAT TIME. THE ON-RAMP WAS CURVING NORMALLY TO THE RIGHT, PROVIDING ACCESS TO THE WESTWARD BOUND TRAFFIC LANE. WHEN THE WHEELS LOCKED THE VEHICLE SPUN TO RIGHT, BUT TURNING THE STEERING WHEEL TO LEFT, INTO THE SPIN HAD NO EFFECT ON THE SPIN-OUT. THE PICK-UP TURNED 180 DEGREES, AND THEN ROLLED DOWN THE EMBANKMENT ON THE INSIDE OF THE ON-RAMP CURVE, THE NORTH-SIDE OF THE ON-RAMP. I WAS INJURED, EMS REQUIRED I BE FLOWN BY HELICOPTER TO THE MEMORIAL HOSPITAL IN MODESTO, CA. THE CA HIGHWAY PATROL INVESTIGATED THE ACCIDENT, AND PERSUMABLE TOOK A WITNESS STATEMENT FROM THE TRUCK DRIVER WHO WAS FOLLOWING ME AS WE ENTERED THE ON-RAMP. THE WITNESS, WHO HAD IMMEDIATELY RAN DOWN THE EMBANKMENT TO RENDER ASSISTANCE, SAID HE HAD NEVER SEEN ANYTHING LIKE IT BEFORE, THE WHEEL JUST COME OFF. BEING INCAPACITATED FROM THE ROLLOVER WRECK, I DID NOT GET THE NAME OF THE WITNESS, BUT THE INVESTIGATING OFFICE MUST HAVE. THE ACCIDENT REPORT IS NOT AVAILABLE AS OF THIS REPORT WRITING.