I don't get it. but then again im doing math that i dont know is the right formula. Take the stock size for example 215/45/17 215 divided by 100 = 2.15 multiply that by 45 and you get 96.75.... 215/55...= 85.25. Isnt that a smaller wall?
That size is a hit or miss though.
While I didn't experience any rubbing, others have and again some others haven't.
I suspect, I'm just traveling lighter, as my interior is always cleaned out, and I rarely have passengers.
Why exactly are you wanting to go to a taller size?
Oh, and 205/55/16 is no problem at all.
A lot of us SVTF owners use that size for winter tires.