DT Swiss 370 LN Ratchet Freehubs

[Jaybee]

So I understand that the Ratchet LN upgrade for DT 370 hubs allows the use of star ratchet instead of 3-pawl drive, but can one also swap freehubs with native star-ratchet DT hubs? i.e. can I just pull the freehub off my DT 350s or 240s and slap it on the 370 hub? Or is there a specific and different freehub body that goes with the Ratchet LN that I should use?

https://www.dtswiss.com/en/wheels/wh...-ln-technology

[muttley]

I'm not familiar with the "LN kit" but I sourced the parts myself and did the 3 Pawl to Ratchet swap on a Giant branded DT370 hub a while back and used a regular Ratchet freehub, didn't require any special freehub. My guess is that DT Swiss has just made it easier for you by putting all the required pieces together in a kit.

[yetitotheheady]

They are different. There is a larger seal on the LN freehub bodies that fit up against the hub shell. However I believe you can do what you are suggesting, if you don't mind not having a proper seal on the hub.

https://cyclingtips.com/2021/04/dt-s...bs-and-wheels/

This article explains it well.

[Jaybee]

Originally Posted by yetitotheheady

They are different. There is a larger seal on the LN freehub bodies that fit up against the hub shell. However I believe you can do what you are suggesting, if you don't mind not having a proper seal on the hub.

https://cyclingtips.com/2021/04/dt-s...bs-and-wheels/

This article explains it well.

James Huang to the rescue - thanks for that!

As DT users with multiple wheelsets know, it's pretty convenient to just take the whole freehub, cassette attached and plop it on another wheel.

[foo_fighter]

You can swap the seal over too.

BTW, I assembled a whole kit for this swap and it turns out my 370s are even older and not swappable.
Let me know if you're interested. It has the pawl-ring removal tool, the star ratchet ring install tool, the ratchet ring and washer. I also have a 18T star ratchet for the conversion.