The metal dividers you're picturing are called frets
You are sitting at the table, chips in front of you, and the wheel is spinning. The ball rattles across a ring of metal dividers before settling into a numbered slot. If you called those dividers "spokes," you would not be alone, but the term does not match what they do. A spoke connects a hub to a rim and carries load. These dividers do not connect anything; they separate one pocket from the next and deflect the ball as it loses speed.
The correct term is frets, sometimes called separators or pocket dividers. They are thin metal fins, usually set at an angle, that rise from the wheel's lower track and define the boundary between adjacent numbered pockets. The number of frets equals the number of pockets, because every pocket needs two boundaries and each fret serves as the boundary for two neighbouring pockets.
So the question "how many spokes on a roulette wheel" is really asking how many numbered compartments the wheel holds. That number is not universal. It depends on which wheel layout is in front of you.
European and American wheels carry different pocket counts
Two wheel designs dominate real-money roulette. The first, commonly called the European or single-zero wheel, has 37 pockets: the numbers 1 through 36 plus a single green zero. The second, the American or double-zero wheel, has 38 pockets: the same 1 through 36, a single zero, and an additional double zero. Both wheels therefore have the same number of frets as they have pockets.
That one extra pocket is not a cosmetic difference. It changes the mathematics of every bet on the layout. The table below sets the two designs side by side.
| Feature | European / single-zero wheel | American / double-zero wheel |
|---|---|---|
| Total pockets | 37 | 38 |
| Zero pockets | 1 (single zero) | 2 (single zero and double zero) |
| Number range | 0 to 36 | 0, 00, and 1 to 36 |
| Frets (pocket dividers) | 37 | 38 |
| Effect on house edge | Lower edge on equivalent bets | Higher edge on equivalent bets |
Because the extra zero pocket is a losing outcome for most bets, the American layout gives the operator a larger mathematical advantage on the same wager compared with the European layout. The house edge and the return to player always sum to 100% for the same bet under the same rule set, so a higher edge means a lower long-run return to the player.
How a round moves from buy-in to settlement
Knowing the wheel's anatomy is only useful if you know how a round proceeds. The sequence is consistent across most real-money tables, whether you are at a physical venue or playing a live-dealer game online.
You begin by buying in. At a physical table you place cash on the felt, never directly into the dealer's hand, and the dealer exchanges it for roulette chips. Online, you fund your account through the cashier and then load the table. Roulette chips are typically colour-coded per player at a live table so that bets on the same number do not get confused.
Next comes the betting window. You place chips on the layout to select which number, group of numbers, or characteristic you are backing. The dealer, or the software in an automated game, will announce when no more bets are accepted. From that moment your wager is locked.
The wheel is spun in one direction and the ball is launched in the opposite direction along the upper track. As the ball loses momentum it drops past the frets, bounces between pockets, and settles. The dealer marks the winning number on the layout, clears all losing bets, and pays winners according to the posted odds for that bet type. Losing chips are swept first; winning bets are paid on top of the original stake, which remains yours until collected.
What each decision point on the layout means
Roulette looks chaotic because the layout packs many betting options into a small space, but every wager is a choice about how many numbers you want to cover and what odds you accept in return. Covering more numbers means a higher chance of winning on any single spin and a smaller payout when you do. Covering fewer numbers means the opposite.
Inside bets sit on the numbered grid. A straight-up bet covers one number. A split covers two adjacent numbers. A street covers three numbers in a row. A corner covers four numbers that meet at one intersection. A six-line covers two adjacent rows. These bets differ in payout and in how often they are expected to hit, but they all share the same underlying wheel and therefore the same house edge on a given wheel type, with one common exception on American layouts: the five-number bet covering 0, 00, 1, 2, and 3 carries a higher edge than the other inside bets.
Outside bets sit around the grid and cover larger groups. Red or black, odd or even, and high or low each cover 18 numbers. Dozens and columns each cover 12 numbers. On a European wheel, a bet on red loses when the single zero appears, which is precisely where the house edge on that bet comes from. On an American wheel, both zero pockets defeat it.
The comparison below shows how the main bet families differ in coverage and payout structure.
| Bet type | Numbers covered | Payout structure | Where the edge comes from |
|---|---|---|---|
| Straight-up | 1 | Larger fixed payout | Zero pockets not covered |
| Split | 2 | Mid-sized fixed payout | Zero pockets not covered |
| Street | 3 | Mid-sized fixed payout | Zero pockets not covered |
| Corner | 4 | Mid-sized fixed payout | Zero pockets not covered |
| Six-line | 6 | Smaller fixed payout | Zero pockets not covered |
| Red / black, odd / even, high / low | 18 | Even-money payout | Zero pockets lose |
| Dozen or column | 12 | 2-to-1 payout | Zero pockets lose |
None of these choices changes the built-in edge of the wheel. They change how wins and losses are distributed across your session: the frequency of winning spins, the size of the payouts, and how long a given bankroll tends to last at a given stake.
Where the frets and the layout meet the rules
Before you sit down, check two things on the specific table in front of you. First, look at the wheel itself. If it has a single zero, you are on a 37-pocket layout. If it has both a zero and a double zero, you are on a 38-pocket layout. Some tables use a European-style wheel but an American-style felt, or the reverse, so read the wheel rather than assuming from the table's appearance.
Second, check the table rules for any bet-specific conditions. Some tables publish minimum and maximum stakes for inside and outside bets separately. Some progressives or side bets, where offered, require a separate qualifying wager and carry their own return structure. The posted placard at a physical table, or the game information panel in an online game, is where the operator states the wheel type, the table limits, and any special rules. That panel is the authoritative source for the table you are playing.
Procedural mistakes that cost new players at the wheel
The first mistake is betting before you know which wheel you are on. A player who assumes every table is the same may sit at a double-zero wheel without realising that the extra pocket raises the house edge on every ordinary bet. Comparing the two layouts before you buy in is the cheapest decision you will make all session.
The second is touching or moving chips after the dealer calls no more bets. On a live table, late movement can void a wager or draw a warning. Decide your bet, place it, and leave it until the spin settles. Online, the betting timer closes automatically and the interface locks your position.
The third is confusing the payout with the total returned. When a straight-up bet wins, the payout is quoted as a multiple of the stake, and the original stake is returned on top of that. New players sometimes read the payout figure as the total amount they will receive and misjudge what a winning spin does to their balance.
FAQ
Why do people call roulette dividers spokes?
Because the frets radiate outward from the centre of the wheel, they resemble the spokes of a wheel from a distance. The resemblance is visual only. A spoke supports a rim; a fret separates pockets and deflects the ball, so the engineering function is entirely different.
Does the number of pockets affect every bet the same way?
No. On an American wheel, most bets are affected by both zero pockets, but the five-number bet covering 0, 00, 1, 2, and 3 carries a higher house edge than the other inside bets. On a European wheel, the single zero is the sole source of the edge on the standard bets.
How can I tell which wheel a table uses before I bet?
Look at the wheel or the game information panel. A wheel with one green zero pocket is the 37-pocket layout; a wheel with both a zero and a double zero is the 38-pocket layout. The table placard or the online game's rules panel will state the wheel type and the table limits.
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