Roulette Racetrack Bets | Called Bets
The racetrack bets can be found on a number of roulette tables, and allow you to place bets across sections of the roulette wheel. Racetrack bets are also known as "called bets" and will usually be found at the majority of good online casinos, on such tables as "Roulette Pro", "Roulette Gold and of course "Racetrack Roulette" depending on which casino you are playing at.
The racetrack bets can only be found on the European and French versions of the game, so essentially only on wheels without the '00'. Online, the racetrack bets can usually be made via the actual racetrack betting area, or via buttons on the side of the screen.
Below is a diagram to highlight which numbers each of the racetrack bets are bet upon when selected.

Voisins du Zero (Neighbours of Zero) - 17 Numbers - 9 Units
The numbers in this particular bet include 22 and 25, and the numbers that lie in between them. The numbers that are bet on in this series are therefore 22, 18, 29, 7, 28, 12, 35, 3, 26, 0, 32, 15, 19, 4, 21, 2 and 25.
Orphans - 8 Numbers - 5 Units
Also referred to as "Orphelins", these numbers are split across 2 sides of the wheel and are sandwiched in between the Voisins du Zero and the Tiers du Cylindre. There are a total of 8 numbers bet on in this sequence, which are; 1, 20, 14, 31, 9 and 17, 34, 6.
Tiers du Cylindre - 12 Numbers - 6 Units
This bet uses the remainder of numbers that have not been used up in the two sequences above, and covers a total of 12 numbers using 6 individual split bets. The numbers bet on in this sequence are; 27, 13, 36, 11, 30, 8, 23, 10, 5, 24, 16 and 33.