This could be bent wheels, warped rotors, loose steering parts, etc. You will need a hands-on inspection. If you don't work on cars then use this link to find a shop near you.
https://repairpal.com/repair-shops
Alex
RepairPal Certified shops can diagnose and repair your 2011 Ford Explorer. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.