[Jamie1977]

Hi, I've got 20" alloys on my 435d (link below) and 35 (front) and 30 (rear) profile run flats.

I'm about to buy new tyres all round, planning on ditching the run flats and wanted to ask if I could go up a profile without the tyres rubbing? and also to fill the arches a little (see photos attached)?

And in general what are people's thoughts on doing this?

Cheers

https://www.alloywheelsdirect.net/bm...05m_wheel_3138

[alohasurftoad]

OEM
225/35/20(26.2")
255/30/20(26.0")

up a profile, raises total vehicle height 0.5"(13mm)
225/40/20(27.1") may touch spring perch and/or rub while turning full-lock, from being too tall(rub example pic below)
255/35/20(27.0") taller gearing (at pavement) will affect tip-in throttle

max fitment
245/35/20(26.8") front
255/35/20(27.0") rear

here is 245/35/20 at ET35 square on an F31 shows proximity to spring perch and taller fitment
https://f30.bimmerpost.com/forums/sh...d.php?t=849595

for no issues and best rim width to tire width fitment, my recommendation is
235/35/20(26.5") front
245/35/20(26.8") rear

my personal philosophy is lower the vehicle to reduce wheel gap OR combination of lower mildly and increase tire size slightly.
.

[fortythirtyfive]

Originally Posted by Jamie1977

Hi, I've got 20" alloys on my 435d (link below) and 35 (front) and 30 (rear) profile run flats.

I'm about to buy new tyres all round, planning on ditching the run flats and wanted to ask if I could go up a profile without the tyres rubbing? and also to fill the arches a little (see photos attached)?

And in general what are people's thoughts on doing this?

Cheers

https://www.alloywheelsdirect.net/bm...05m_wheel_3138

Personally I found 235 to be pretty square almost round on an 8j front wheel, the same with 255/35 on an 8.5j rear. I eventually went back to 255/30 on my rear which gave it a little more stretch.

PS4S' naturally have a square sidewall compared to those P-Zeros, those have a stretched look even when oversized.