because when i change the diameter - the Speed indicator shows
other results..
in this moment i have mounted :
255 60 R15 - the rim has 15x10 offset - 51mm
they don´t work and have contact to body...
The offset is crazy.. (offroad rims)

So now i want mount..
front : 225/70 R15 (Rim = 15x8,5 offset -20)
rear : 255/70 R 15 - Rim - same like in the front
is 70 from aspect ratio ok ? i like it when its little bit more hight

thanks for
