In general, the Speed G+ line (as a whole) is, in my experience, just a bit less durable than the old Corsa Evo Pistas. They should handle some outdoor rides, but you really need to check them after every ride if you do. It's easy to pick up small nicks in the tread. Carry the bike to/from the track. I've had Evo's last a season+ on outdoor tracks that are by no means "nice." I have some G+'s waiting to be glued up and expect similar, but make no mistake, they are 100% race day tyres.