Vitus bikes dee vr city bike nexussimplicity no fuss low maintenance meet the dee vr smooth rolling big wheel action with disc brakes for improved stopping power and all weather reliability now add to that an internal geared 3 speed nexus rear hub and the versatility of this bike reaches new heights 29er wheels mean a bike that rolls better over rough roads and small kerbs while shimano hydraulic disc brakes with 160mm rotors mean more controlled braking especially in the wet at vitu