The hubs we have designed are designed to be easy to work on, and be relatively maintenance. That being said, it’s the only part of the wheel that has both moving and non-moving parts. This is where you want to ensure that you check over the hubs at regular intervals to keep everything running smoothly.
The easiest thing to check is the bearings. If you spin the wheel in your hand, you can feel if the bearings still feel nice and smooth or if they have gotten gritty over time. Bearings are a part where they are good until they are not. Once they feel like they have gone bad you will want to replace them. Riding on bad bearings for a prolonged period of time could lead to the bearing suffering a failure and leaving you stranded (similar to if you drive your car on a bad wheel bearing). Pressing in new bearings is very easy and usually relatively inexpensive.
Keeping the pawls and driver ring lubed is important. This is the only spot on your bike where you have metal parts moving against metal parts (not counting bearings). The hubs will come pre-greased, but over time this grease can wash out of the hubs. I usually add grease to my pawls about twice per year to ensure everything remains properly lubed and running smooth. We sell the NixFrixshun Speed Coat grease that was specially designed to work on the insides of hubs. One tube is pretty much a lifetime supply and will keep your hubs running smooth.
On any of our hubs sold after 2013 there is a pre-load adjustment to dial in tension on the axle. If you go to the page for our Prime hubs you will see a video on how to adjust the pre-load. Checking this every couple of months takes about 10 to 20 seconds, but ensures that your hubs are running smoothly with no play and no side load on the bearings.