16vvincent wrote:
1) I have a great dislike for the bearing covers with a grease nipple. I have found (I am a mechanic and do see this fairly ofter) that people over grease the bearings and push the grease seal out of the back side. This happened with my Hobie trailer. The replacement bearings were not very expensive, but just cleaning them are regreasing them on a regular basis would be enough maintainance.
If you have bearing protectors you should keep them. I've tried it both ways; even with perfect new rear seals I would still end up with water in the hub after a launch without a pressurizing cap. You'll have water in your bearings every time you launch without them. As long as you don't overfill (max out the spring) everything will be fine.
From a popular manufacturer:
"Trailering, even a short distance, heats the hubs. When the wheels are submerged during launching, the hubs suddenly cool and the air inside the unprotected hubs contracts, forming a vacuum which draws in water through the rear seals. There is no such thing as a rotating seal that stays perfect. Water and grit thus drawn into the hubs relentlessly destroy bearings."