After some help.
I want to run staggered size wheel widths front to rear. I understand that the rolling circumference has to be similar. Does anyone know the exact tolerance so I don’t blow up the diff.

I want to run this set up
245/40/20 front
275/35/20 rear

Rolling circumference
2211.7 mm front
2200.7 mm rear

Difference
0.498%

Is this possible? Or could someone point me in the direction of a specialist who could help.
Cheers