tyre wear (not quality), brake wear, tyre pressure and reaction time make for the performance and effectiveness of an emergency stop.
I find the brand culture in the tyres market quite ludicrous, they sell us this idea of better gripping and braking performance, when it really doesn't make much of a difference in cars below 300hp...
Sorry, but this whole doesnt make much of a difference in cars below 300bhp is just a rediculous thing to say. The main difference there is putting the power down, which is contollable by the driver via a long pedal on the right hand side of the drivers footwell. Braking and loss of stabilty & traction etc in wet and extreme conditions is what is being debated, and those factors are far much less controllable by the driver.
Thats like saying if you drive a Nissan micra you might as well put the cheapest & hardest tyres money can buy on it, because its below 100bhp. But the tyres are small, the suspension is basic and the brakes are small so high quality rubber is far more important to make up for the lower tech parts.
And going on about tyre pressures, tyre wear, suspension etc is a whole other debate all together.
Would a Accellera with 60% wear perform different to a Pirreli with 60% wear then
Would my suspension be in any different condition if i change my brand of tyre
Would my brakes be less worn if i switched to Acceleras
I drive on Nankang AS-1's, so you can see i'm not a brand snob. But when tyres are being debated, chucking power and car condition in the mix is pointless as this aspect is the same regardless of tyre brand on the wheels.