-Bottom line here is: "The guy riding the bike is still responsible for its safe operation."So there are a couple of points relative to safety I'd like to make. As others have mentioned if you are riding on the road then keeping up with traffic affords some degree of safety, as cars are not rapidly overtaking you...
Also, for comparison sake; the highest speed I have reached on my road bike is 55mph, the highest speed on my CCS is 42. It is incumbent on the rider/driver to control the bike/vehicle they are operating safely within the conditions they are traveling...
...The guy riding the bike is still responsible for its safe operation.
If I had hit someone on my road bike when I was bombing down a canyon road at 55, would anyone really think the bike maker was at fault?
Also, back to the original subject; the CCS felt very stable, safe, and comfortable riding downhill at 42 mph.
I remember well the day I reached a screaming 45+ mph down hill speed on a country road in South Bristol, NY. That speed was all about gravity and momentum, with my 230+ pound physique on a 30 pound Bianchi Road bike with rim brakes. https://bikejournal.com/blog.asp?rname=bikerjohn&cdate=9/7/2013