But the non-Performance N has another suspension as the level is appx. 10mm higher in front and back. Other suspension - other alignment.
Where is the source where you got that information? No one will adjust anything when changing to the 18" winter wheels. You need adjustment when you change the suspension. Nothing to adjust by changing to 18" or even 20".
Again, the differences in setup is because of the different suspension (see ride hight) not caused by rim size.
@Brendan now some time has passed, could you please tell us if you would buy the SuperSports again? I am looking for an overal good tire. ~2 times a year a trackday / some roadtrips and overal spirited driving + commuting every day.I'm very happy with Goodyear supersport in 235/40r18 on Motec ultralight wheels, I haven't tried PS4 on the i30n but did on my Scirocco and I would say the Supersports are substantially better. The grip levels of the Supersports on 18 inch wheels isn't significantly different to the PS4s on 19s with some definite advantages but that is likely to be due to loss of unsprung weight. I'd say the Supersports are noisier than the PS4s though.
Sounds good! So you prefer them above PS4/PS4S?I haven't tried them on the track but more than happy for everyday use and would purchase again without hesitation.
Thanks mate!@jeroenvde
225 or 235/40 R18? If 235 you can get the PS4S from Germany: KLICK
I was sure to purchase the Goodyears till the PS4S appeared in 18” in Germany. Couldn’t resist, the choice then was clear.
@Brendan now some time has passed, could you please tell us if you would buy the SuperSports again? I am looking for an overal good tire. ~2 times a year a trackday / some roadtrips and overal spirited driving + commuting every day.
I am a bit worried about the noise they make, I will go from 19" Pzero's to 18" SuperSports.
However the lower weight might be a good compensation for the extra noise.
Please advice
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Transformed to what?They transformed my Boxster S when i fitted them all round.
Transformed to what?![]()
If you plan on going for a track day once in a while rather go for Michelin PS4S i would say, and if you want a bit more meat on the sidewall go for 235/40/18, for that you will need a rim that is 18x8 prefferably, but also 18x8.5 can be ok i think.Right, I'll probably get told to read through the forum to which I already have and have found an opinion from almost every forum member, some contradicting each other lol...
But I'm looking at swapping to 18" Wheels with some Michelin Pilot Super Sports and I'm not overly clued up on all things wheel and tyre based so need a bit of help etc, but reason for change is -
a) I'm Hoping that there will be a little bit more padding than with 19" wheels to soften up the ride a bit.
b) Road conditions in Glasgow have been pretty bad as of late, and I've just burst a P Zero so a little bit more confidence and safety that I wont burst a tyre if I so happen to go through any risky potholes.
c) Reduction in un-sprung weight for some fast road driving and maybe a track day down the line, but mostly road use.
d) P Zero's are great in the warm dry days, but Scotland sees very little - So PS4's are obvious choice to me.
So given all this, Could anyone help/comment on what they would suggest from experience the best dimensions for wheel and tyre to go along with that would fit for daily driving in mostly wet and cold conditions with some fast road driving on the good days please?
Thank you![]()

If you plan on going for a track day once in a while rather go for Michelin PS4S i would say, and if you want a bit more meat on the sidewall go for 235/40/18, for that you will need a rim that is 18x8 prefferably, but also 18x8.5 can be ok i think.View attachment 11578