Ok, so my options are between these two setups of the same rim.
1) 20x8.5" +35 offset, 6.12in backspace
2) 20x8.5" +12 offset, 5.14in backspace
My tyres are 285/50/20 coopers. I already have them on my current rims. Unfortunatley i know nothing about these rims other than they are 8" are are...