vibrates in right front at 75 mph. tread wearing uneven. stops past 75.

Pulling can be caused by: -A bad tire (rotate tires left to right to see if the pull changes the other way) -Alignment issues - especially caster related, although toe being off really far causing a steering wheel off center concern can simulate a pull -Tire sizes, tire air pressure concerns --Ride height variances --Front end suspension or steering issues that are affecting alignment angles Regarding the vibration -- this can be unrelated. Check for proper wheel balancing. Preferably have access to a "Road Force Balancer" that checks for tire balance issues when the tire is in contact with the road surface. A bad wheel or bad tire could cause a vibration also. Any way you look at it, you need a sharp tech knowledgeable about front end steering, suspension, wheels and tires to help you diagnose you concern.