Was wondering, how long do the bearings in a direct trainer generally last? How about the driver itself? Anyone have one long enough to require maintenance and how big a PITA it is or is not to do on your own(if it can be done on your own and not void a warranty) Maybe none of this questioning is applicable.

I just want to be aware of what I might be getting into if I go this route vs my wheel on KK machine(need to do wheel bearing replacement on my trainer wheel)