Usain Bolt: By the numbers

Usain Bolt, the greatest sprinter of all time, will run his final Olympic race Friday in the 4x100m relay.

He's seeking a third straight gold medal in the event, which would complete an unprecedented "triple-triple" of gold in the 100m, 200m, and 4x100m.

Let's break down the legendary Olympian by the numbers:

41 - Number of strides Bolt typically needs to complete a 100m race - about three or four fewer than his rivals.

$33 million - Bolt's annual earnings, according to Forbes, which is roughly 10 times what other track and field stars earn, putting Bolt at No. 32 on the list of the world's highest paid athletes.

30-40 mph - Theoretical limit to human speed.

29 mph - Bolt's estimated top speed.

13 - Bolt's shoe size, which makes his feet an awkward fit for the starting blocks.

6'5" - Bolt's height, which is considerably taller than every world-class sprinter in history.

3 - World records held by Bolt (100m, 200m, 4x100m relay).

1st - Bolt is the first and only sprinter to win the 100m in three straight Olympics, and the first to win the 200m in three straight, as well.

0 - Olympic medals won by Bolt that aren't gold.