Jared,
In March, 2016 I did my annual condition inspection and for the first time in several years completely removed every part of my nosewheel to inspect, clean and repack the bearings. I wish I hadn't as there was no wear at all and it was a pain to get everything back in place. The bearings are sealed so I was not able to repack. Seemed like a waste of time to me. I do most of my flying off airport, too.