Not sure exactly what you mean by the bearing itself. But...the TJ's have a seal hub/bearing unit. You will see the cotter pin, nut, etc. Being that its a sealed unit, the dust and water and grime doesnt get in. You can get a center cap for the wheels, but IMO its just one more thing to break when you go off road.
>Help -- I recently bought a '99 TJ that has Centerline Hellcats on it. While
>>rotating my tires, on the front with the rims off, I noticed I can easily see
>>the axle nut (with cotter key) and I think even the wheel bearing itself....
>>should there be some sort of cap to keep the dust, water, and grime out?? My
>>CJ had lockouts on it, and I'm still pretty green with the TJ's. >>
>>TIA
>>Trent