Just serviced all my ebike freehubs which all happen to be DT Swiss. Never done that before. Three 370 ratchet hubs, one regular and two hybrids and one 240 EXP hybrid. All were in mint condition, most km’s on my commuter, 2.5 years and around 10000km`s (picture below). DT Swiss wheels are kind of lame, graphics are little dull
. And there`s nothing special on hubs either, dull sound if anything….but damn these are high quality! Never have had any problems, not with the wheels or hubs. Even the tubeless tape is great. And those tubeless valves, looks like you have some cheap innertubes still on your bikes but those are high quality stuff also. And that basic service is childs play, no tools needed, only DT Swiss special grease.