Thats the question to which no-one knows the answer I am afraid @alwhit. We’ve never replaced any on our protos or demo fleet, and none are showing signs of needing to be replaced any time soon. Given that the oldest demo bikes have seen 3 or 4 rides a week on average for 8 months, thats a pretty long life already in normal riding terms.
We spec Enduro Max full ball sealed bearings in normal sizes so when the time comes you’ll have plenty of options to choose from online for replacements, including of course from us at a reasonable, un-inflated price.