Well i suppose the good news is that the quality control of the CN12 is now fixed https://www.longstonetyres.co.uk/tyres/255-60x15.html difficult tyre to justify making as it only originally fitted a couple of years ov V8 Vantage https://www.longstonetyres.co.uk/classic-car-tyres/aston-martin/v8-vantage.html and the rear of a Muira SV. https://www.longstonetyres.co.uk/classic-car-tyres/lamborghini/miura.html I must say my brother in law had a V8 vantage on the 16" wheels and i didn't like them, the square shoulders of the tyre made it track on uneven motorways, and for general steady driving the were unpleasant and gave a rough ride. i particularly didn't like it when i drove it home from a car show at the Birmingham NEC in t he wet. (i would much rather have driven the early plastic bodied 308 GTB back that would have been much more fun). However when that car went to auction i drove it to Newport Pagnell to the auction, and had a pretty open road where i gave it everything, and while receiving a sound thrashing it all came together, I could just get it to start to drift the back end a little and progressively on full throttle on the way out of roundabouts. Obviously this was all on private roads and i would also like to point out of course that breaking the speed limit is a heinous crime!