Depends on what kinda they are. I've seen cheap $10 Abec 3s and 5s works just as fine as some Bones bearings. As long as you take care of them, they will stay in good condition. But since a decent set of bearings don't cost all that much, just use them until you feel like changing them. I've skated for 5 years and I had a set of bearings that lasted me through out the year. Bones REDS? I'm pretty sure you're familiar with the name. But they are really durable. They ain't fast, but they are durable.
