The PowerPack 500 battery charges quickly thanks to the 4 AMP charger so you can keep on going.;Dropping to a lower gear at those pesky red lights is easy and intuitive with the Shimano Nexus 5-speed internal gear hub.;Easily track your commutes on the Bosch Purion handlebar display.;700c Schwalbe tyres are perfect for handling the rigours of the road.;