...and when your tires wear out...then what? You might not want to use the same type of tire. ( or originals might no longer be available )...it happens. I don't see why bike frames can't come with some manufacturers reflective tid-bits. Reflective tape comes in many different colors ( including black ) and is relatively cheap. Even cheaper are the reflective spoke straws ( like in the George3 photo ) If I weren't using wheel lights I'd go with reflective tape on parts of the frame and the ( removable ) reflective spoke straws. I've seen the reflective spoke straws in action and they are pretty awesome. Being circular, they reflect light from all kinds of odd angles.