My only issue with those, having not actually tried them, is since they sit so close to the frame that I'm not sure they would give you a good view of the road. I'd be afraid the only view I would get would be that of my leg moving, which I'm pretty sure wouldn't help much in watching for traffic. But like I said, I've never used one so they might work better than I would expect, but I'd rather have a mirror placed further from the frame so I could see beyond my own body/bike.