Wheel and Tire setup - please help

[majj35]

Please Help with wheel and tire setup


Right now i have 17s , but deciding to either get new wheels with same setup or move to 18”.

My current setup:
Front: 17x8, 4.5bs, 0 offset, 235/45
Rear: 17x8, 4.5bs, 0 offset, 245/45
Measurements from ground to fender:
https://static1.pt-content.com/images/pt/2020/01/49340344097_e005cac354_z-1.jpg (https://flic.kr/p/2ib3aiT)

Gap between rear tire and fender: 1.9"

What im looking for most importantly, is having a more deep dish style wheel (rear) instead of the wheel to align. Like the image below
https://static1.pt-content.com/images/pt/2020/01/49338476833_35226f2d01-1.jpg (https://flic.kr/p/2iaSAeF)

Ive read so many threads but still need some confirmation on tire size, backspace and offset.


My Options:


1) Stick with 17”s
Front: 17x8, 4.5bs, 235/45
Rear: 17x9.5, 5.5bs, 255/45 (275 for 17s isn’t available here)

Question for this setup:
A- front backspace: 4.5 or 4.75?
B- what offsets? All 4

-

2) Upgrade to 18”s
Front: 18x8, 4.75bs, 235/40
Rear: 18x9, 5.25bs, 275,35
Rear2: 18x9.5, 5.5bs, 275/35

Question for this setup:
A- front backspace: 4.5 or 4.75?
B- what offsets? All 4
C- Are the tire size combo good? I chose this as it would be closest to my current ride height now
D- 9 or 9.5, opinions?




Things to consider:
-Front: 2” coil springs, 3/8” coil spacers, 2” drop spindles, adding 1/8” wheel spacers (slight tie rod/wheel rub), brakes unknown (i think 10.5”)

-Rear: ridetech leafs + 1” lowering block, might add 1/8” wheel spacers, brakes unknown (i think 10.5”)