Luca
does the maths work
I would be on ca. 75% per set
trust me, the equation i use is 70/x+2
in the case of mediums its 70/6=11.66
11.66+2=13.66
Itll work fine
And heres the reason the numbers are used
70 cause 30% is the cutoff point so 100-70=30
and +2 because thats what it rounds up to as the wear on each tyre decreases lap by lap and by the end of what should have been its life, they end up with an excess of 2 laps