Winner was Michal Kwiatkowski (Team Sky) in a long breakaway out of the lead group. Greg Van Avermaet (BMC) was second. If by disc wheels we are talking about disc brakes I highly doubt anyone was using them. The pros don't want to see a mixture of disc brakes and rim brakes in the peloton due to differing braking rates in corners.
OOOps - yes. my errors. I guess I was taken by the photo of the mud covered Van Avermaet crossing the line 2nd. Yes - I meant disc brakes. Here is a picture of Tom Bonen's first pro win on a bike with disc brakes in Jan : http://www.velonews.com/2017/01/news/tech-milestone-boonen-wins-first-race-with-disc-brake-bike_429063
Unfortunately, a day later there was a controversial accident where another pro claimed his shoe was cut by a disc. This was later disputed by video evidence. None the less -rightfully so IMHO, the pro racer association is protesting the use of disc brakes and trying to get them banned until a safer version is available. I'm hoping to see more about the bike tech used at Strade Bianche as this promises more tech development and eventually trickle down to us. Of course, fickle me - last year I was moaning about the possible commercialization of gravel bikes racing.