Join Date: Jul 2005
Location: Central Illinois, USA
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Yes, it's a freewheel hub. I thought I'd ask because when the freewheel is screwed on, I can see the surface of the bearing through the small gap between the inner part of the freewheel and the lock nut. When the wheel is mounted, the dropouts on the frame protect that gap somewhat, but it's not too hard to imagine some mud or water splashing in there. They are indeed sealed cartridge-type bearings, so I'm not excessively worried about it, but I thought I'd ask. There certainly is enough space between the bearing and the freewheel for a dust cap to fit in there.