i got approx 20 track days out of the 595RS, plus driving to and from the track, cruise days, DECA etc. ~ 6-7,000km over 6 months
they grip well down to the wear indicators, then start to squeal and slide.
went to ku36 and did ~8 track days in 3-4 months, they are down to the wear indicators and have very little grip.
back on 595RSR now, love em. ~6 track days so far, they are wearing well. the grip is the wet and dry is fantastic.
and as i said all four have the 'line' in them this time around.
i do find the RS and RSR are not as progressive as the ku36 tho, when the federals loose grip they really let go. the ku36 seem
to give you a bit more of an indication.