i'm going through the same decision making process.
wanna go for AT3's in 235/55 r18 OR 235/60 r18
difference is a speedo error of 4,16% or 7,21%
i've got a t6.1 Cali with 215/65 r16 tyres 2WD manual gearbox.
since i'm lowered, i wanna fill the arches, the 235/60 will do a better job (differs 10mm with the 235/55)
If you look at "T5 upgrades" at facebook , they almost always seem to opt for 235/65 r17 , that's about the same as the 235/60 r18
wanna go for AT3's in 235/55 r18 OR 235/60 r18
difference is a speedo error of 4,16% or 7,21%
i've got a t6.1 Cali with 215/65 r16 tyres 2WD manual gearbox.
since i'm lowered, i wanna fill the arches, the 235/60 will do a better job (differs 10mm with the 235/55)
If you look at "T5 upgrades" at facebook , they almost always seem to opt for 235/65 r17 , that's about the same as the 235/60 r18