2017-2023 BMW M550i / M550d (G30/G31) Carbon Ceramic Brake Rotors Stelvio any carbon-ceramic disc that hasn't

any carbon-ceramic disc that hasn't been tuned bites less than iron when it's cold-that's physics

leaving a little extra following distance is still the smart move until the front discs reach operating temperature

How do these behave in winter cold starts compared to iron rotors

which we reuse

Straight physics: an untuned cold carbon-ceramic disc bites a little less than cold iron until it comes up to temperature

2017-2023 BMW M550i / M550d (G30/G31) Carbon Ceramic Brake Rotors Stelvio any carbon-ceramic disc that hasn'tReal Customer Builds & Reviews View All Will This Fit My Car? Direct Replacement CCB Discs (Retain Factory Calipers) for the 2017 2023 BMW M550i M550d (G30 G31). Factory rotor specifications and the smallest wheel that clears each trim: Trim Front Rotor (Factory) Rear Rotor (Factory) Min. Wheel Size M550i M550d 374mm, 395mm 345mm, 370mm 20" Keep Your Factory Calipers? The rule is simple: front factory calipers must be 4 piston or more; the rear has no