Overall, the Pirelli SF3 is a good tire with impressive road grip and very low noise levels, making for a quiet and comfortable ride. However, getting them properly balanced has been a real headache.
During installation, all four wheels were standard bench-balanced, but I immediately felt a steering wheel vibration at around 100 km/h. I took the car back and had an on-car finish balance done on the front wheels only, which solved the steering shake at 100 km/h. But when I push the speed up to 140-150 km/h, a subtle vibration comes back-this time clearly originating from the rear end. Since the rear tires still only have the basic balance, my next step is to take the car to a shop with a Road Force balancing machine to sort it out completely.
In short, while I genuinely like the tire's performance, these persistent balancing troubles make me hesitant about whether I would buy them again.