Modern Vespa

Im really liking the 12" wheels on the sprint and newest vespas and I want to know if I Can upgrade from my 11" wheels to 12" wheels on 2015 Primavera 50

Greetings:

I can't speak to that specific swap, but be advised:
I had a spare 11" front wheel from the later models and it bolted right up to my 2003 ET4, which runs a 10. You'd think such a small change wouldn't make much difference, but it was night and day - in a BAD way. Evidently raising the axle up that half-inch threw off the rake-and-trail geometry and the scooter drove like microwaved dog poop! It tended to fall into turns and required constant concentration to keep going in a straight line. If the frames on the Sprint models are at ALL different from those of the Primavera, I wouldn't bother.

my understanding is that the frame is exactly same even yo to 2022 .. the new ones have 12" so maybe the back could be adjusted and fork lowered... hmmm