[Stocker]

Do the rotors just slip off over the lug studs, or are they pressed on to the hub? I've seen illustrations of rotors and of complete rotor/hub assemblies, and I'd like to get the right parts before I start the job. And are the cheap ($25) rotors any good? Truck is driven daily but mostly short trips in town, hasn't had heavy hauling or much highway use for years. Thanks, guys.