yeah I feel comfortable at high(ish) speed on my road bike, just not on my tri bike.
I had a quick look through some workout files
- a few weeks ago I rode the Shiv with normal training wheels and I hit 44 mph without feeling too sketchy
- at IMCH on my Felt B2 Pro (old 404 and 808) I hit 44 mph on most downhills and this was at my comfort limit (many people were a lot faster than this)
- on my road bike (normal wheels) I hit 44/45mph regularly. I'm not at all uncomfortable at those speeds, the bike just doesn't go much faster
- shiv with 404s: I chicken out at 40mph
so to answer your question - I am comfortable at speeds a little higher than 40mph but I don't seem to often hit 50 mph as you do. I would be comfortable at 50 mph on a road bike, not in aero or on my tri bike. It should be noted that I use a bottle between the bars which may add some instability...
I had a quick look through some workout files
- a few weeks ago I rode the Shiv with normal training wheels and I hit 44 mph without feeling too sketchy
- at IMCH on my Felt B2 Pro (old 404 and 808) I hit 44 mph on most downhills and this was at my comfort limit (many people were a lot faster than this)
- on my road bike (normal wheels) I hit 44/45mph regularly. I'm not at all uncomfortable at those speeds, the bike just doesn't go much faster
- shiv with 404s: I chicken out at 40mph
so to answer your question - I am comfortable at speeds a little higher than 40mph but I don't seem to often hit 50 mph as you do. I would be comfortable at 50 mph on a road bike, not in aero or on my tri bike. It should be noted that I use a bottle between the bars which may add some instability...