offset sizes needed to tuck 22x9.5

hi im about to purchase another set of wheels
20/22 combo

im getn
20x7.5 on front---225/30/20 tyres
22x9.5 on rear--- 245-255/30/20 tyres
what offsets to i need to be able to tuck these wheels & tyres

any help would be great guys

well iv ordered my wheels
i got +35mm offset so im hoping it will all work haha

okay on the 20" wheels if you are going with a 7.5 rim you need at least 5.5 inches of back spacing and on the 22s with 9.9 inch rim you need at least 7.5 inches of back spacing. Remember they measure the insert part of the rim where the tire sits if you mesaure the outer edge to outer edge you will see that a 7.5 inch rim is actually a 8 to 8.5 rim and the 9.5 is 10 to 10.5 inches wide. In the end you want 2 inches of your rim on the outer part of the brake face.