I don't think this is very useful for cycling in cities anyways. It's perfect for road cyclists, though. * In cities, I always expect cars to be behind me, and

I don't think this is very useful for cycling in cities anyways. It's perfect for road cyclists, though. * In cities, I always expect cars to be behind me, and cars expect cyclists * There is more protection from wind in cities, so the chance that I can hear those cars is higher. Outside the city it's more dangerous. When going downhill at more than 50 km/h, or on a flat stretch with side winds, the chance that I can hear cars behind me is close to zero. * The speed limit in cities is lower