[fly_marlin]

Hi all,

My first post here. I've had the '24 I4 M50 for about a week now. It came with M Sport Package Pro, 19" wheels and red calipers. I've had trouble finding out whether the rotors are 348mm or 374mm, but I did read another post here that suggested I'd have 348mm rotors. Is that right?

Second question I have is regarding tires. My other car is '14 Q50 and I've had almost every summer tire worth having on it. Until now, I've never cared about low rolling resistance. I currently have ECS on the Q50 and prefer them to the PS4S that I've had on it before. The only reason I'd consider the PS4S over the ECS2 is the low rolling resistance. While I don't plan to regularly drive long distances on the BMW, I still don't want to sacrifice range/efficiency. If anyone has experience with these sets on their car, do you think range/efficiency savings of the PS4S would be noticeable over ECS2? Thank you all in advance.