[sloss]

I'm saying that you get either Very Good grip and rubbish life or very good life and rubbish grip.

There is a happy medium where you get adequate grip and adequate life.

You say: "and on the flip side, tyres that grip well and last long"

That just does not happen.

Look at F1 - soft tyres grip like sh1t to a blanket or the longer life ones that last a lot more laps but not so good grip therefore slower lap times.