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Road, gravel or MTB?
The road from Briancon to Sestriere can be busy, but wide enough. There is a tunnel on the Sestriere side, but bikes go on the old road from memory.
Definitely do the Colle delle Finestre to Susa, simply stunning.
If you are on a gravel/mtb, the Strada dell'Assietta (Strada Provinciale 173) is also riveting. Basically what I am suggesting is the Torino-Nice Rally route, in reverse.
Need some route advice for France/Italy.
Planning a week trip around the alps, going over the border from Briancon to Sestriere then down towards Turin. Is the road up and down okay (in terms of traffic etc)?
On the way back into France, I'm planning Susa -> Mont Cenis -> Val d'Isere -> Cormet de Roselend then down to Annecy. This seem reasonable?