Depends how hard you ride really, the NN and RR have lightweight carcases if you rode here all the time they wouldn't last long at all. Seen a lot of ripped sidewalls on NN and similar. My tyre of choice at the mo is the Fat Albert 2.4 UST. Mates just ditched a nearly new Highroller 2.35 Lust, as that was ripping every time we went out, so they're a little too lightweight IMO. That said the trails are super fast and grippy at the moment so that obviously means the tyres get a harder time.