If you use the DT Swiss spoke length calculator you can tell it you're using the 411RR Assymetric and it'll calculate the lengths. Assuming the hub dimensions are correct, and using 12mm nipples, it gives 288mm NDS and 286mm DS.
Alternatively, if you can find out what the offset is on the assymetric rims (I couldn't online) then you can just tweak the flange spacing figures. So if it's a 2mm offset, that would make the flange spacings 18mm and 36mm rather than 16mm and 38mm.
Usual caveats apply about making sure the hub dimensions you get off the net are correct.
If you use the DT Swiss spoke length calculator you can tell it you're using the 411RR Assymetric and it'll calculate the lengths. Assuming the hub dimensions are correct, and using 12mm nipples, it gives 288mm NDS and 286mm DS.
Alternatively, if you can find out what the offset is on the assymetric rims (I couldn't online) then you can just tweak the flange spacing figures. So if it's a 2mm offset, that would make the flange spacings 18mm and 36mm rather than 16mm and 38mm.
Usual caveats apply about making sure the hub dimensions you get off the net are correct.