Trek rail 5 rear wheel bearings

[Flyingmike9]

Just inspected these due to movement in wheel expected to see seald bearings but no
Is there a sealed bearing set I can purchase to upgrade too if so anybody have a link or part no.
standard boost wheels with micospline

 

[Trekkie]

I just had my bike mechanic replaced mine with better quality bearings. Planning to change my hub soon

 

[idunne]

do you no the bearings size