Soft alloy compound may also be a reason for more sidewall. Stiffer sidewalk for turbos. Tire size per rolling resistance and inertia from a standstill. See wagons wheels after John Wayne goes Yah! Sweet spot for hp, torque reaching the ground. Liked my Potenzas, wrong tire pressure shortened lifesp...

Anyone having this spotting issue? [img][/img]

replacing standard bulb with LEDs.
flat edge screwdriver into slow and slowly twist.
Removed mirror by tilting outer edge toward door, inner edge toward engine. Horizontal plane.
PULL outer edge away from car. You'll see mirror clips when it pops out.