Originally Posted by
noisebeam
That may be good on a (non-sport) motorcycle, but unless you cycle in a very upright position there will not be much effective reflective surface area pointing to the rear.
The largest effective area of most cyclists (regardless of BMI) is their butt, not their upper back.
Al
+1 Good call!
Also, reflective tape on various parts of the helmet (edit - or hat/cap for non-helmet wearers) help a great deal as well.