Driving back from the shops today in some drizzle… I went through a round about (3rd exit)
Probably about 15mph ? Maybe more.
I probably went to fast… but this is the first time the back end skipped out and I spun…
The car is auto also… so wasn’t expecting it… fresh undies required.
The tyres came with the car… they are ching chong fakestones what ever… the grip was awful.
Reccomendations on tyres please… as I cannot afford to spin out and hit something or heaven forbid someone ! 
Exactly the same thing happened to Jayne shortly after we got our MX5 Mk2.5. We were exiting a roundabout and she probably booted it a bit too soon and lost the back. Fortunately she caught it and nothing happened. Our problem was the tyres had good tread but were very old so we swapped them all for Kumho Ecsta Le Sport KU39. Never had a problem with grip since.
These tyres have less than 400miles … but they are cheap… proper cheap.
Looks like you already know the answer…ditch the moody tyres and you should be fine, fine, fine 
I nearly lost mine on an island (filling station right off the island) I had decent tyres on. I reckon on a fuel spillage could have been the cause, it was also wet conditions. That was about the only time it happened.
Check pressures also, only 400 miles suggest, newish tyres they could be over inflated, maybe a combination of the two re hazardous road condition.
Over the moon with my 4 new tyres on my NC 3.5. I fit ‘Goodyear F1 Asymmetric 5’.
The best deal I could find for these was by ordering online from Quickfit and had them fit at my local Quickfit. I paid just £330 for a set of 4off 215 - 45 -17 fitted and Balanced.
Also had my car tracked on a Hunter System at another tyre company.
I hope this helps.
Roy
Tyre pressures most likely cause, rather than the brand.
Not tyre pressure this time… I check regularly as I drive alot…
If you spin don’t blame the tyres . Every tyre has limits, and they are much lower in greasy conditions . Cheap tyres often have lower limits but it’s the driver’s job to control the car when it exceeds those limits -and that is much easier to do on cheap tyres at low speed than good tyres at high speed . I grew up in an era of cheap nasty cross plies and dodgy radials which gave hilariously little grip - and I learned a hell of a lot about car control , and at safe speeds .
By all means get decent rubber , but far more importantly get yourself booked on a skid pan session too. No shame in learning new skills and it is huge fun.
Could be down to cheap tyres but more likely as suggested a bit of spilt fuel. Or even funny tarmac, I know a roundabout in Lincoln which has an odd bit of tarmac just as you exit roundabout onto dual carriageway . For some reason in the wet it’s very slippy and catches people out every time it rains.
MX5’s seem to be very sensitive to tyres, always four the same, not old tyres as they do harden with age and good quality tyres and make sure that the pressures are all good.
I have Michelin Pilot Sports on mine and I just don’t seem to be able to unstick the rears or get the fronts to slide.
With the hardly worn old original bridgestones on, the car was dangerous, particularly on damp or wet roads.
Also, how old were the prior, very old tyres you mentioned?
How old?
They were 2014 fitted from the factory. Others have experienced similar issues on old tyres. So they were six years old when changed.
Grip was very low as was braking performance too.
The car was transformed with the new tyres, not only overall grip but ride quality, steering accuracy and feedback, road noise and just general feel of the car. Best £400 I’ve ever spent on a car
Yes, i thought they’d be about that old. 7 years is a lot.
Yes, it may well be down to spilt diesel, which is like hitting ice.
HGVs are often filled to the brim, which means when the vehicle goes round the first few corners, some of it exits the tank.
When the bus station was in the centre of Kingston, this was a notorious problem.
If it was diesel, just be grateful you weren’t riding a motorbike…
The “new” middle roundabout on the Great Yorkshire Way in Doncaster is the same. The outside lane on the exit stretch towards the M18 is lethal in the wet, probably due to the diesel spillage from the many lorries dumping fuel from the inside lane.
I don’t get this negativity for the standard fit Bridgestones. I am very happy with the grip on my car even in the wet. Not so long ago a friend of mine (who regularly takes his car for track days and who is Chairman of the Lotus Drivers Club) was following me in his Lotus Exige and we were going through a series of roundabouts in the wet at what to me was a moderate pace. He said he struggled to keep up and he observed that my car appeared very “planted”. He said his car was sliding all over the place just to keep up.
Ambasize,
Glad you are OK but we had the same (?) issue way back in 2006 when my wife graduated from an old Renault 5 Campus to the 2002 VVT Sport. No difference then…
Some joker had fitted set of Hoo-Flung-Dungs from some far off YangTang Province and the first day we had it out.in the rain…I had to do a mahoosive oppo lock correction coming out a wet roundabout…much to my joy and the wife’s horror. Was not pushing it at all, and I was used to many years of powerful-ish RWD stuff.
A set of the (then) much vaunted Toyos transformed it.
I also got beloved a birthday present track training day…she loved it!
I honestly can’t remember. It had been 6 years since they had been fitted, but the tyres could have been older of course.