I've had my truck since almost new.
The jack that came with it is not tall enough to clear an inflated 235/85-R16

Of course it WILL allow you to get the flat off before you figure out it isn't high enough....

I carry a chunk of 12/4 mahogany to set the jack on now.

 

Good to know! I'll put a thick hard wood plank behind the rear seat too then.