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Reply to "my big fat Italian tire turner"

Just a quick calculation will give you an idea of tire height.
Rim Dia = D
Tire size = W (width in mm)
Ratio = r (ratio of W to side wall height)
I.E. a 255 / 50 is 127 mm side wall
Therefore total height is H
H=D+2*(W*r)Make sure you convert to all meteric
or H=(D"*25.4) etc.
Bingo.
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