Tire fitment... help me understand :)

Someone help me wrap my head around this please ... so stock tire on my off road is 265.70.16 ... 30.5” tall by 10.5” wide, when I turn my wheels to look at how much clearance I have I can just put my thumb inbetween the tire and the wheel well .... so how can a 255.85 tire fit without rubbing (per researching) that is 33” x 10” fit! It’s 3” taller ? I get the width is .5” skinner than stock but wouldn’t the 3” more in diameter knock the hell out of both from and rear wheel wells??.... also why would a 255 be considered a pizza cutter if it’s on 1/2” skinner than a 265 stock 10.5” tire ???
appreciate it

 

It's magic.

 

Awesome thanks

 

Heisenberg uncertainty principal. That's how

 

Another helpful message now I C how you got up 2 800 of them