what tyres you running? How are they?..

Had budgets on my panasport's and have to say they were incredible for cheap tyres.?!A testament to how good mx5's handle. Ok they was poo in the wet, but who drives quick on the road in the wet anyway.

I've just fitted some nankang ns2r's to my rpf1's. I had some on my Dc2 and was impressed by them in 15" so see what the 14's are like.

And you can test a tyre on the road, tracks are much smoother than the road. OK so you can go into loony mode on the track if you wish, but you're tyres get a real workout on the UK's country roads if you have a proper spirited drive

I'd try a geo setup if you're experiencing serious understeer on track. Mine only understeered right at the limits on the budgets in the dry and them tyres were really cheap  cheap:)

I had four mismatched budget tyres on heavy 16 inch wheels when I got my mk1, it was... interesting...

Switched to vredestein sportrac 5s on 14s which were really good. Loads of fun and not too melty on track.

Had some r888s, again on 14s, didn't get on with them on track (had the pressures too high though) and we're much too noisey on the road.

I've got Federal RSRs on my mk2 and the grip is incredible. Not at all noisey on the road. But with stock power I feel they might actually be less fun on track than decent road tyres like the vreds or khumo HS51.

I used to run Nankang NS2R's and for the money you won't get a sticker tyre.

I use Rainsport 3's for daily use / wet track use and they're awesome. Very soft walled (so a bit squidgy feeling in turn in) compared to the R888R's I run on track but never used a tyre that grips as well in the wet. Brilliant tyre.

i dont get under steer as such maybe i exaggerate. i just reach the limit on the front and the squeal alot. just need more stick. its not like i turn and the car goes straight on. geo is all good.
i just need a more serious tyre. i have the cheap ultra sports not the sticky ns2r.
they are pretty much brand new so lots of skids and then next year i will upgrade to something really sticky.

Michelin PS3 seems to have become a favourite with the MX5 Challenge guys.

Uniroyal Rainsport 2 - Good dry grip, great in the wet (obviously), wear quite quickly if you use them on track, and they overheat quite quickly. Great tyres if you don't do any track time.

Bridgestone RE002 - Mega dry grip for 'normal' tyres, adequate in the wet, although they're nothing special. Last a long time and don't melt on track like most normal tyres. Grip levels drop off massively as they get towards the wear markers though, IME.

Nankang NS2R (180) - Great dry grip, great wet grip, last well, not very confidence inspiring though IMO, sometimes you just turn in and hope for the best. Hellishly noisy.

Federal RSR - Only used these briefly in the dry, much the same as the Nankangs, but give much more confidence on turn in.

Yoko AD08R - Masses of dry grip, great wet grip, give massive confidence. Can't comment on durability though. Generally more expensive than the Nankangs/Federals.

It's kind of hard to review a tyre without comparing it to others but here's a try:

Yokohama Parada Spec 2 - Until I tried more track focused tyres, I thought these were the best tyres ever. Great feedback and grip on the road, reduced grip in the wet but still a decent amount of feedback so you can feel the car losing grip fairly progressively, total dogprarrie canoee in the snow apart from when you want to do 5mph drifts. Unacceptable road noise if you're only used to road tyres, whisper quiet compared to track tyres. Squealed less than Goodyear Eagle F1s.

Yokohama AD08R - Please see Federal 595RSR review - 125% of the performance for >150% of the price

Federal 595RSR - Excellent grip and feedback in the dry, need warming up in both wet and dry, and fairly hefty road noise. They are surprisingly underwhelming in the wet, it's almost like water robs them of feedback so I often find myself driving quite tense in the wet kind of a split second behind the car, constantly feeling like I'm trying to catch up with what it's doing, which is fairly infuriating. It annoys me that I can't relax with them in the wet.

Yokohama A048R - Hands down the best tyre I've driven on, but so expensive, and Canoe all tread depth when new. Cold, these provide almost as much grip as the 595RSRs when hot (possibly an exaggeration). My MX5 has a paltry 140bhp and it can't shake the back end lose with cold A048rs without weight shift provocation. There is an impressive amount of feedback, except under braking, the car moves about a lot under heavy track braking and I can feel it through my seat but not through the wheel and the pedal, which again is annoying, the level of cornering grip afforded does not correlate with the level of braking grip in my head. Given how quickly I can corner with these tyres, I feel like I should be able to brake later than I can, but then I lock up but I can't feel it lock up instantly so I end up with clouds of tyre smoke and flat spots.