My 2 pence worth. I started my first season on
Yokohama AD08R's, not the new compound. 195/55/15's on TD Pro Race 1.2 wheels.
Worth noting my Clio 182 is running a modified version of the Spax coilovers as used in 750 MC 182 Clio Championships. Stiff as hell.
On track i found them quite grippy for the first few proper laps, then they slowly started to loose grip and after 6 or so spirited laps they'd be sliding all over the place. At Croft i literally took chucks out of them before the circuit was resurfaced. A friend runs them on his half track/road Clio 182 with B14 suspension and likes them, although like me, after a few hot laps they start to slide about. I refer to them as a 10 minute track day tyre. Nice and cheap.
I also had them on my Clio 182 daily with 16" Turinis & 205/45/16 tyres. I found them useless in the wet or cold damp mornings and they made my car tramline something rotten. Switched to 195/45/16 Michelin PS3's and it's transformed the way the car behaves.
Yokohama A050's - Switched to these from the AD08R's for my track car and they're night and day. I could stay out on track twich as long as before and the grip never changed. Obviously they're more expensive but i can't praise these tyres enough. My mate runs them in the TDT championship (45 minute race) with his Clio 182 and swears by them.
They have a re-enforced carcass construction so can take more camber but sadly not road legal haha. I was running 30 PSi in the front and 35 psi rear with - 3.5 negative camber on the front. Ran for 2 seasons and found them really hard wearing. I'd get 4 trackdays out of a set easily switching front to rears to even out the wear.
Yokohama A052's - i moved over to these after the A050's became difficult to find. I found them really grippy and set my fastest times on them. Despite the grip they move around underneath you a lot, but can withstand long stints (20 minutes) with little to no change in feel. They're also good on damp tracks, something the A050's are awful at, so you're not so much worried about the weather - unless it chucks it down of course - then you're fooked.
The downside for me was the degradation. I fitted a brand new set, did Croft and couldn't believe how much they'd worn away. By the time i got to Cadwell Park a month later, they'd literally thrown the towel in by lunchtime. Big lockup at the foot of the mountain and i was loading the car up shortly after lunch.
They're not cheap either at £135 a corner.
I have since discovered a few things about these tyres which would help with the longevity going forward.
1. They don't like as much camber
2. They have no under tread, so as soon as the tread cap is worn out .i.e. flatspot, the carcass belts are exposed and the rest of the tread starts to separate from the carcass.
3. They need slightly more pressure over the A050's, 32 psi front and less in the rears, so 32 psi as opposed to 35.
Overall i liked them a lot and have bought another set which i'll use for damper days and as a back up tyre.
Going forward i've now found a new supplier for the A050's so i'm back on those now. Best tyres i've used for track by a country mile and at £105 a corner i consider them a bargain.
I can't comment on other brands of trackday tyres, but my mate has also raced with NS2R's, AR1's, 888R's and went back to A050's. Personal preference i guess.