I don’t believe that is correct. The height is determined by the aspect ratio which is a percentage of the width. Could be wrong, but I believe that’s how those numbers are calculated.
As ditchrunner stated, the first number is the width. The second number is the aspect ratio (percentage of the width) which applies to
one sidewall. You add both sidewall lengths, plus the wheel length (diameter) to obtain the overall tire height.
295 is about 11.5"
70% of 11.5" is about 8"
A 295/70/17 is then 8" + 8" + 17 = 32" tall and 11.5" wide
A 295/70/17 is then about 32 x 11.5 x 17.
Again, the first number is the width. A 285mm is not a 33" tire, a 295mm is not a 32" tire and a 315mm is not a 35" tire. The first number, width, has nothing to do with the height, but the height has everything to do with the width (when talking about metric sizing).
ETA: I've explained this to a lot of people, but here's another post explaining it if this makes more sense:
https://thebronconation.com/forums/...-terrain-tires-for-badlands.11747/post-173158 2022 Jeep JLR, manual with even more extra guacamole
Sold - 2021 Jeep JLR, manual w/extra guacamole