another wheel and tire fitment thread question

Here is what I'm running-

Stock 8 3/4 A body rear
Cooper Cobra 275/60R15
Crager SS 15x8 4.25" backspace
Espo +1" leaf springs
3/8" clearance to springs in stock location.

Get a slight rub occasionally, with multiple passengers, heavy duty bumps, and steep driveway entrances, but don't see any witness marks on tires, wheel wells or springs, so don't know where they rub.



Fronts are 14x7 Crager SS 4.125 backspace with Cooper Cobra 225/70R14