On Monday, July 9, 2018 at 10:37:07 AM UTC-5, jbeattie wrote:
https://www.cyclingweekly.com/news/r...age-one-385615

Quintana rode over a speed bump and broke both wheels -- Boras I believe.

-- Jay Beattie.

I watched the first Tour stage. The final kilometers, half hour, were wild with crashes. Almost everyone hit the ground. I remember hearing the announcers talk about the speed bump. But did not rewind to watch it closely or pay attention to exactly what happened. So I can't confirm or deny your angle of the speed bump wrecking both wheels. Its easy to believe the speed bump caused riders to crash at 30 mph, and in the crash wheels were broken. But that is a little different from the speed bump itself breaking the wheels.