Webbefore having it aligned i noticed a slight shake in the steering wheel at speeds above 60 and assumed it was due to out of balance tires. Webthe most common causes for a shaking steering wheel in toyota 4runner are unbalanced wheels, misaligned wheels, tire damage, bent rim, bad wheel bearing,. This is likely compounded by the fact that you're running much heavier at tires.
4Runner Steering WheelCover
Steering WheelWrap
Toyota4Runner Steering Wheel
SupraSteering Wheel
TRDSteering Wheel
TundraSteering Wheel
MustangSteering Wheel
CorvetteSteering Wheel
Chevy SilveradoSteering Wheel
Nissan Steering WheelCover
Ford Steering WheelCover
Toyota4Runner Wheels
TacomaSteering Wheel
Usefull Links :