Originally Posted by anthony390
hey i just wanted to know what is the best baering out of these: teflon,rubber or metal
Actually, everyone is off topic here on this post. Teflon, rubber or metal is not a bearing but the sheild of the bearing. And the debate over metal versus ceramic (and even ceramic versus ceramic) will go on forever and it's a never ending battle. But i'll tell you one thing, those that have used both a good ceramic and a good metal bearing will NEVER go back to metal bearings. One thing that I have to add is that a crash that is hard enough to shatter a ceramic ball WILL ALSO DESTROY A METAL BEARING. Yeah, sure the metal ball may not shatter but the bearing will still be useless.
Anyway, back to the point. The #1 reson for a sheild on the bearing is to help keep the bearing free of dirt and debris. The side effect of the sheild is that it adds friction to the bearing.
Rubber offers the best protection from dirt and debris, then teflon then metal. Rubber also adds the most friction to the bearing, then teflon then metal with the least friction.
On a side note, after being well used, at times teflon shields can fall off. Also, metal sheids, once dented render the bearing useless. Where teflon or rubber cannot dent...they bounce back from impacts (meaning that bearing used in the hubs or for wheels that have a rubber, plastic or teflon sheild will last longer than metal sheilded bearing in the same locations).
If you run off-road, stick with a good rubber or teflon sheild. If you run on carpet go with a teflon or plastic sheild. Metal sheilds are widely used on carpet but depending on the conditions of the carpet track, metal bearing require much more maintenance (on carpet I have found that metal shelds keep out dirt but not carpet fibers. Metal sheilds can acutally trap carpet fibers in the bearing causing you to have to replace them more often...at least, that's my experience).