There is a fair number of users that have shifted from the 18/19 to 17/18. This change was mostly due to a broader range of tire options in the 17/18 configuration in the early years of the release. Things have improved over the years, but the 17/18 still offer better options especially in the +1 sizing. This shift has been quite critical for track based users....
The OEM sizing was 205/xx-17 and 235/xx-18, most of us have moved to +1 sizing, aka, 215/45R17 and 245/40R18.
As for road ride quality, it isn't going to miraculously make the 4C a smooth road going car. It does help a little, and I find that I have a lower chance to kill a tire/rim when I hit a massive pothole or curb. The other item is that the PZero's have a much higher tendency to tram-line, and with a different tire selection you can reduce that a lot.
2015 Alfa Rosso Coupe (SE) -
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EuroCompulsion V1 AIS | Pogea Silicone | Capristo Exhaust (Valved) |
Ohlin 2-way | S111 Swaybars & endlinks | Girodisc Rotors | PFC-11 pads | Rudi's UniBalls (Rear) |
S111 Harness Bar | Technocaft T2S Seats | Schroth PROFI II 6-point |
OZ ALLEGGERITA 17/18 - Falken RT615K+ | OEM 18/19 - Pirelli PZero | XPEL Ultimate (Full)