Loose description of 'road', this one wouldn't be averse to somewhat extra grip on certain roads on the northside of the valley. The first half is almost totally traffic-free until you reach the main pass road down from Aprica. In summer this gets a little busy so just watch out for motorbikes careening their way up the pass, in a mad dash to overtake lorries. It's not great but it'll whizz by. Then you're back onto small roads. You have to rejoin the main road super briefly before you start the climb to Teglio, but it isn't a dealbreaker, we promise.
A hilly route, but unfortunately off the cards in winter. All of the climbs will be worthwhile.