Mine do 52km/h (32mph) without pedaling in flat terrain.
Nicolette, '91 Huffy Caribou with a 1000w 48v rear hub / 48v 20ah LIFE-PO4
Will get more speed when I'll replace the gearing, currently 50/14 on 26x175". Aiming for 56/11 :roll:
Still refining her.