I want to know if my hub is sealed, and how i find out. It's because i heared some bearings moving I think, but I'm not sure whether it is my hub, or bottom bracket? Also, can bearings move in a sealed hub anyway?
1984 Trek 520: "the Bronze"; '80s Panasonic road bike (innominate); '97 Raleigh Century: "Rubeus" because it's red, and twice as heavy as a normal bike; blue 90's Peugeot Mackenzie :"Bix" (beaterbike), 2007 green Bike Friday New World Tourist.
It's unlikely that balls are rattling around inside a hub. They're packed in grease, and even if it gets dirt and grit in it, the balls are still going to be coated in it and not clacking around.