After several weeks waiting, well about 6 actually, they turned up straight from the factory.
They're not particularly cheap at £575 fitted but I was looking for a tyre that was capable of occasional track days that wouldn't get out of it's depth on circuit and would also deliver good performance on the road in most conditions. I considered the usual suspects that are track focused but road legal but kept coming back to these and decided to wait for Michelin to deliver.
Delays were down to this being a new size/specification as until recently it's been supplied to Porsche, Ferrari and BMW predominantly and I believe sizes now start at 18".
To drive on they are significantly different. I have to consider that I have had them fitted to wheels that are 3kg lighter than the Pirelli alloys (which weigh in at 11kg and are very front heavy) but the grip levels are vastly improved in the dry and particularly the wet. Steering sensitivity (and weight it feels) is improved, as is turn in due to stiffer side walls I'd imagine.
Sudden increases in torque are also better managed in all conditions from low speeds. Braking levels are also higher (in the wet at least) before ABS intervention.
I can't say that F1's were a bad tyre at all, but for a stage 2+ vehicle I rate these very highly. Very happy with them indeed. Not unhappy with the wheels either, I shamelessly followed Red Robins lead here.
