Rear Versus Front Tire Widths

NOW!
HERE IS ANOTHER CONCERN ABOUT THE WHEEL WELLS!!!

I'm currently on 15 inch tires with a 60 aspect ration.
All the tires I am seeing that I like are all 70 aspect ratio.
My head is swimming with drawings and numbers.....will the 15 inch /70 tires be taller????
(Over an inch taller by my calculation)
:rolleyes:
All this is in the context of finding wheels that will tuck back into the wheel wells. And I don't think the 1/2 inch ouside daimeter will be a problem for tucked-in tires.
And, there are far more 5x4.5 bolt pattern 15 inch wheel choices than 14 inch choices.