Sorry for the confusion!
Here what is indicated on the data sheet:
Buggy Rear Tamiya DB01 2,43
Buggy Front Tamiya DB01 4,35
Buggy Rear Tamiya Durga 2,10
Buggy Front Tamiya Durga 3,39
DB1 data come from above, Durga data comes from elsewhere, can't remind me.
One set look like theorical and the other from measurement. I don't use Tamiya stuff so if someone can provide the adequate information to sort out this point, that will be great!