04-23-2010, 01:42 PM
Most of the new bicycles and motorcycles too have started using sealed bearings and bottom brackets. I can see some maintenance advantage. For newbies. However a well maintained bearing system lasts a long time while many sealed systems require periodic replacement.
For instance the BMW motorcycle used thrust bearings with a seal on the outside. Properly maintained and set they last much longer than the sealed bearings.
So whats the advantage of sealed bottom brackets? They sure cost a lot more.
For instance the BMW motorcycle used thrust bearings with a seal on the outside. Properly maintained and set they last much longer than the sealed bearings.
So whats the advantage of sealed bottom brackets? They sure cost a lot more.
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