If the settings of the belt is correct and it doesn't get damaged by stones, it will last very long, at least one or two years. But it is more than likely that sooner or later a little stone will destroy it. My outdoor track experience is two killed rear belts in three years (running nearly every weekend). So I would recommend to have at least one rear belt as spare. Otherwise outdoor you will not destroy many parts. Get some C-Hubs as spare, maybe some blades and enjoy your hobby
