While the City Elite 2 is designed for all terrain with big wheels and all wheel suspension is has not been designed for running/jogging.
The only stroller in the Baby Jogger range designed for running is the Summit X3, as the Summit X3 includes feature like extra-large air tyres (like bicycle tyres) speed control/Slow down hand brake, high performance suspension, front wheel swivel lock lever on the handlebar and front wheel alignment adjustment.