My average was 18-20km/h, but half the journey was on the Vistula river bank which makes lights irrelevant. https://um.warszawa.pl/documents/61166/6599671/08102

My average was 18-20km/h, but half the journey was on the Vistula river bank which makes lights irrelevant. https://um.warszawa.pl/documents/61166/6599671/08102017_Bulwary-5_0.jpg https://um.warszawa.pl/documents/61166/6599671/08102017_Bulw... Still, would assume 16-18km/h is minimum reasonable speed unless you ride like a pensioner.