4Runner tire size.

[Gooniegugu]

2019 4Runner, what’s the biggest tire I can put on this rig without a lift?

 

[Pat McRotch]

Duh! 4D4's

 

[90supra]

4ds!
Edit: way late

 

[east_beast]

38.5x14.5, but only Thornbirds will fit in that size but that's the best tire for everything anyway.