245/45 - 102W or 255/45 - 104Y on 19" - 8.5j rims

[CaliCampMianch]

I'm currently running 275/35 - 20R 102 but I find these tyres to wide and want to try and find the biggest rims with the smallest width but still meet a load index of 102. Who runs the 245/45 on a 19" rim? Is the tyre bending inwards on a 8.5 rim? Because the correct tyres would be the 255/40 - R19" but these do not exist with the right load index. I can only find 265/40 R19 with 102. But that is not much smaller than the 275. Any pictures and ET values available?

Thanks
M