As I read somewhere on the forums, I decided to stick some reflective tape on my rims. I bought some 3M Scotchbrite self-adhesive which was red in color. The problem is that I don't find it very reflective at all! I pretty much need to shine a flashlight directly on the tape to get any reflection. Maybe it's a problem with the red color? I think I may need to try silver next time, which is a shame, red looks nicer on my bike.