https://www.bikeradar.com/news/vision-metron-4d-road-handlebar-launched-eurobike-2013
Vision Metron 4D road handlebar launched - Eurobike 2013 | BikeRadar
May 29, 2019 - Flattened carbon bar aligned to natural elbow and wrist angles
vision metron 4droadhandlebarlaunchedeurobike