Originally Posted by
cyclezealot
Don't trust em.. I 've had them. Pay close attention. I've seen them come loose and start flopping about on the spoke. Turning the wheel on the road, and its a good way to screw up a wheel. I suggest, seeking out tires with a reflective circular stripe about the tire itself.
It is true that you have to actually check them and make sure they're actually mounted correctly. I don't know, I've only got 16000 miles, 1/2 over rough gravel roads, with 6 different wheels, and none of my reflectors have budged an inch.
If they're mounted right, they're pushed all the way to the outside, wedged between three spokes, THEN clamped in place with the mounting screw, and the centrifugal force of the spinning wheel holds them in place even tighter. There's no way a properly mounted reflector will come loose unless someone messes with it. Even if it does, I don't think it'd do any harm, it'd snap in an instant if it got wedged somewhere.