300
The increase in the number of degree of exigibility 1 crown control properties in 2015.
Degree of exigibility 1 means it 'affects tire performance'.
What is 300 measurements or 20%?
These are mostly MFTR, Cassage, and Shore. MFTR ensures good performance in NC and FE for all LP's, where Cassage and Shore help with KM performance in TC.