It amazes me that something as important as your tyre, the only thing you have connecting you to the road, people buy as cheap as possible.
Further to entwisi,
Volvo 850 T5 Estate, Jill's Car, Tyres Continental Sport Contact 2, Size 205/50ZR16 Price £403.86 last set of 4 I bought. Very good value for money, considering that the most precious person in the world to me, drives the car.
Would have likes the P Zero's but the Volvo Eats them. We get about 20,000 Miles out of the Conti's.
BMW 318is Coupe, my car, Tyres Dunlop SP Sport 2000E, Size 225/50ZR16 Price £407.97 Last set of 4 I bought. Original fit by BMW. Good tyre, lasts 30,000 Miles.
Cheap tyres, well for Jills the cheapest are around £60 each and mine the same, but I value our lives more than that.
There is a good site here about tyres.
Car Bibles : The Wheel and Tyre Bible Page 1 of 2