Ride comfort won't change between sport and comfort settings (obviously since you don't have adaptive suspension). 19's are definitely going to decrease your comfort level, but it's all relative to your interpretation of what's comfortable (especially as a daily driver). I would never own another car without adaptive suspension regardless of tire/wheel size.
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Current: 2024 BMW M3 Competition xDrive | 2022 Audi Q7
Gone: 2022 Audi RS5 | 2020 BMW M340i | 2019 Audi RS5
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