The gait of individual tigers varies from animal to animal, but certain things are common to them all.
All cats walk on their toes; their heels are positioned halfway up their legs. During a walk, the tiger lifts both limbs on the same side together. This gait is similar to that of a camel, and quite unlike that of a horse.
Some people claim the tiger has almost mathematically precise movement with the hind paw stepping in exactly the spot previously occupied by the forefoot. Others have done careful measurements and claimed a slight lag by the rear paws. Yet another idea is that the longer length of the hind legs creates an impression of the hindfoot falling ahead of the forefoot.
It now seems most likely that the overlap only occurs during the stalking of prey, but in a normal walk, the separation can be of some inches.
This helps tiger in running at a faster speed than other animals.