Some brands tend to be better than others, but that’s a matter of preference. I like the Michelin Latex tubes, or for butyl the Continentals. I hate the Bontrager lightweight tubes, they are the most prone to flatting. For training and beating the piss out of I’d say go with the Kenda Butyl tubes, they’re dirt cheap, but unlike Kenda’s tires, they’re a pretty solid and bombproof tube.