Added the rear tyre to the scoot. Had a little problem getting it into place. The panel holding springs where in the way. Since this is an early TV S3 they were not possible to turn down and away. Had to dismantle them. But finally it is in position.
Just have to remember to tighten the nuts before setting off!
Lambretta TV175 Series 3 
Is this the finaly wheel assembly?
Have you put the hexagonal screw to secure the nut on the cranckshaft?
Ciao