They aren't grooved. The noise would drive you crackers in traffic....

But they are floating discs- toleranced for a road car

How much is a set with pads Si?
Need to get some for mine at some point, but won't be until I have the callipers done..

Pilot Sport 4 tyres added this weekend and initial thoughts from a quick 30min run out is very good. They feel a little more supple than the Avons they have replaced and a little quieter too. Not sure if anyone else has experienced the slight feeling of vagueness in the steering at dead-ahead that sometimes occurs from the electric power steering. These tyres do seems to reduce that a bit too, so all good at present. A great deal from Kwik Fit at £401 (supplied and fitted) and with a voucher for a one night hotel stay thrown in.

Pilot Sport 4S on Tarks, 225 at the front and 245 at the rear, as recommended.
A VAST improvement over the Avons ZZs that the car was built with.
Interestingly, the wheel rims are exactly the same, 225 is the narrowest fitting allowed for the wheel width, which is why the rim is so east to scuff.

Hi Peter, that's really interesting. I couldn't get the tyres sizes in Pilot Sport 4S hence going for Pilot Sport 4. I've got 245/40 18 and 225/40 18. I agree they are massively better than the Avons. Fingers crossed for some sunshine this weekend!

Paul, I have 19" AeroMax wheels, not the standard 18" wheels. So you may be right.

I couldn't get Michelin Cross Climate tyres for 19" rims, but they are available for 18".

the availability of tyres in specific sizes is unpredictable....

OK, that makes sense, I'll get some Cross Climates for my other set of 18s

Blimey - just seen my TM "Status" - its been a long while since I've had L Plates - lol

I've been searching for tyres
& looking at reviews... it's a rabbit hole that can consume you for days. The "same" tyre can perform differently relative to others, when the tests are of different sizes, on different cars and presumably different surfaces.
& nobody runs tests on anything like an Aero!

Anyhoo.. I spotted this - the weight of tyres - which is not often given.

https://www.tyrereviews.com/Article/2021-Tyre-Reviews-UHP-Summer-Tyre-Test.htm (scroll down past the barcharts to the results & weights)

So for example for 225/40 R18 92Y
Pilot Sport 4S 9.76kgs
Goodyear Eagle F1 Asymmetric 5 9.44kgs
Bridgestone Potenza 9.98kgs
Pirelli P Zero PZ4 9.37kgs

The 2.6kgs difference between the Pirelli & Bridgestone in an 1100kg Aero might be material?
I'm no suspension expert, but I'd think that reducing the mass at each corner has to be a good thing.

My search was for the I8, which wears factory-fit run-flat Bridgestones. Runflats are never the best handling tyre. And with a carbon tub I'm looking for a quiet tyre to reduce the inherent cabin noise. All other things being equal (which they more or less are!) I'll take the 0.6kgs lighter & quieter Pirelli (-1Db before choosing the variant with 50% noise reduction tech) vs the Bridgestone.
https://www.tyrereviews.com/Article/2021-Auto-Bild-19-inch-Summer-Tyre-Test.htm has figures for all three in 19 inch size

The more relevant 2021 test for an Aero might be UUHP 20 inch tyres, which doesn't give weights: I guess the relative weights will stay the same
https://www.tyrereviews.com/Article/2021-UUHP-Summer-Tyre-Test.htm
I'm really not sure what tyres I'd put on the Aero if I was buying today: P4S looks like the best blend, still.

Will

I have, and would replace, PS4s on the Plus 8
The Tesla has these,

https://www.blackcircles.com/tyres/brands/michelin/pilot-sport-4-s-acoustic

and might be worth considering on the i8.

Essentially the inside of the tyre is lined with a sound absorbing foam about 1cm thick.
They cost a little more and Tesla M3 owners who have replaced the Acoustic version with non acoustic equivalents suggest the acoustic versions are quieter.