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Im not sure about that - im no expert at all, but taking a look at the cutaway on this page https://www.dtswiss.com/en/innovations/ratchetexp (the new 240 uses the same technology I think) indicates that you still need to remove the ringnut to get at that bearing. I might be missing something though.
Fabs-
I think you're right, I think the last few DTs I've had to service, that bearing has been fine and I've been mostly been messing with some Mavic hubs that use a very similar system and got them confused.
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I think the older ones the ratchet was held with just a spring each side, on the new ones one ratchet is screwed in the hub body and you need a tool for that.
snottyotter
Netakure
It's only older DT hubs that need the ring nut tool, if you're buying new then they use the star ratchet rings which are really good and easy to service or upgrade to more engagement points. Hope look a bit nicer though.