Riese&Muller UBN Six Silent , FREE 100 mile tune up service, The UBN Six. Easing you into urban riding., The UBN Six eases you into urban riding. Ride effortlessly from A to B, thanks to the lightweight and silent Fazua Ride 60 drive system, and comfortably get on and off, thanks to its low step-through. With its ease of operation and wealth of connectivity features, the UBN Six is setting totally new technical benchmarks in the E-Bike world. , Pure White , 51cm Low Step, Fazua Ride 60 60Nm, Alfine 8 Speed Hub Gears, Gates Belt , Control Hub Display, Fazua Energy 430 Wh Battery, Comfort kit , White,