Simple Method for Determining Roulette Wheel Bias

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Roulette Wheel Bias

Many consider roulette to be an unbeatable game. However, this line of thinking isn’t entirely true.

You can beat roulette through both cheating and wheel bias. The latter refers to an advantage gambling technique that gives you a big edge over casinos.

The catch: you must normally spend a number of painstaking hours devoted to this craft. Or do you?

An Australian mathematics professor has proposed an easy way to use this advantage play method. That said, I’ll discuss more on wheel bias, why it’s limited, and the professor’s simpler way of beating casinos.

How Does Wheel Bias Normally Work?

Wheel bias refers to the practice of looking for biased wheels in casinos. A roulette wheel is designed to produce random results.

A wheel with 37 pockets, for example, should give every pocket the same chance of winning. Biased wheels, on the other hand, favor the ball landing in certain pockets over others.

These wheels become biased due to wear and tear. A number of aspects can lead to this phenomenon, including worn frets (pocket dividers), tilted wheel shafts, or warped ball tracks.

You can’t spot these imperfections with the naked eye. Even if you could, a dealer or pit boss would likely notice them before you and promptly remove the wheel.

Instead, you must record results from a wheel and use the data to determine bias. The data may lead you to determine that a pocket or even entire section are compromised.

Upon finding this information, you can bet on the biased pocket(s) and hold a built-in advantage over casinos. You’re guaranteed to make profits in this situation over time.

Why Does Wheel Bias Suck in Modern Roulette?

Wheel bias would be great if you could just document results for an hour or so on each wheel and eventually find imperfections. You’d then play on the biased wheel and earn thousands or even millions of dollars.

Unfortunately, this process requires much more than 1-2 hours of work. It forces you to spend days or even weeks recording results and searching for a biased wheel.

Assuming you’re looking for “section bias” (an entire section that’s biased), you’ll need to record at least 500 spins per wheel. When searching for “pocket bias,” you’ll need 4,000 to 5,000 spins’ worth of reliable data. You earn more profits through biased pockets, because you can capitalize on single-number bets (35:1 payout). But as can be seen, section bias is much easier to spot.

I use the word easier lightly, though. You’ll likely need around 10 hours just to collect data on 500 spins for a single wheel.

What if you don’t find a biased wheel here…or on the next wheel…or on the next one…or even in the entire casino!?

Starburst wheels throw yet one more wrench in your plan. This brand features metal frets and is much more durable than older wooden wheels.

Many casinos now use Starburst products to prevent advantage players from beating them. You typically need to find a casino with wooden wheels to profit from this method.

Mathematician Proposes a Simpler Way to Spot Wheel Bias

Based on everything covered so far, you likely don’t want to walk around casinos recording countless results. In the end, you may just be pouring hours down the drain.

However, Michael Small, a mathematics professor at the University of Western Australia, proposes a much simpler option.

Small famously carried out a study with Chi Kong Tse showing how roulette can be beaten through the chaos theory. He and Tse used devices to predict where the ball would drop shortly after it was released.

Using electronic devices to beat roulette is now illegal in every jurisdiction. Therefore, you can’t legally beat roulette by using Small’s research.

But through a press release regarding the study, he did offer an easier way to find biased wheels and win profits.

“If you wish to beat the house, look for a wheel for which the ball drops only from one side of the rim – that is, a crooked table,” Small explained. “Prediction becomes substantially simpler and more reliable.”

Small is essentially talking about looking for a warped ball track or damaged wheel shaft (thus causing the tilt). Assuming you see the ball dropping from one side more consistently from any side of the rim, you’re likely dealing with some sort of bias.

Casinos may be able to spot this defect much quicker than you. Nevertheless, it’s an interesting and simple advantage gambling method that’s much faster to use than wheel bias.

Will You Ultimately Be Successful With Michael Small’s Roulette Strategy?

Nothing is guaranteed in gambling. Small’s strategy is no different, because it relies on perfect variables to come into play.

  • First off, you’re only searching for two variables when you watch where the ball drops. You must hope that the ball track and/or wheel shaft are somehow damaged in order to gain an edge.
  • Next, you have to spend some time watching the wheel. After all, the ball dropping from one general area five consecutive times isn’t enough to declare the wheel defective.
  • Finally, you need to worry that the casino could notice the same defect and take action before you make serious profits. Small noted, “Minor adjustments will [erase] the advantage of the physicist-gambler.”

Even with an edge, you need an adequate bankroll to take on the casino. Small covered this by pointing out that you could still lose serious money when bad luck strikes.

“Even if the odds are in your favor, there is still a probability of losing, and losing big. In the long run you would come out ahead but you may first need very deep pockets.”

What Other Roulette Tips Can You Use to Win?

I strongly suggest that you give Michael Small’s roulette advice a try—even if only for fun. Assuming you don’t spot any bias, though, you can fall back on the following tried-and-true roulette tips.

Always Play on a European Roulette Wheel

Roulette wheels generally break down into the following three categories:

  • American wheel – Has 38 numbers, including a zero and double zero pocket.
  • European wheel – Contains 37 numbers, including a zero pocket.
  • Mini wheel – Features 13 numbers, including a zero pocket.

Of these, the European wheel is definitely your best option. It offers a 2.70% house edge, because it only has one house-friendly zero (1/37 = 2.70%).

The American wheel features two house-friendly zero pockets. Therefore, it carries a 5.26% house advantage (2/38).

Mini roulette is unplayable without any modifying rules. It only has a single house-friendly number, but it also contains just 13 overall pockets (1/13 = 7.69%).

Look for the La Partage Rule

The la partage rule is the great equalizer for mini and American roulette. It also creates one amazing European game!

This rule returns half of your money when you make an even-money bet that loses due to zero. If you wager $10, for example, then you’ll get $5 back in this situation.

La partage lowers the American and mini roulette house edges to 2.63% and 3.85%, respectively. It reduces the European roulette house advantage to 1.35%.

This rule ultimately makes the mini and American wheels playable. It turns European roulette into one of the best bets in the entire casino.

Consider Online Roulette

You can’t do much to reduce the roulette house edge beyond searching for a European wheel and/or la partage. However, you can at least use proper risk management by choosing stakes that best suit you.

Land-based casinos typically feature higher minimum roulette bets that range from $5 to $10. If you’re perfectly fine with these limits, then by all means play at brick-and-mortar casinos.

Assuming you’re not, though, then you can find even cheaper stakes at online casinos with roulette. Most gaming sites only require you to bet $1 per round to play.

Take Advantage of Roulette Bonuses & Loyalty Rewards

Both online and land-based casinos offer VIP rewards. The gaming industry bases these comps on a percentage of your total betting action.

For Example:

A casino may comp 0.1% of your roulette wagers. If you bet $20,000 at this venue, then you can look forward to $20 worth of rewards.

$20 isn’t going to turn you into a massive winner. However, it at least ensures that you get something back on your action.


The traditional way of finding wheel bias is incredibly difficult work. You need to walk around the casino and record thousands of spins in hopes of finding a faulty wheel.

Michael Small offers a much-easier way to spot defective wheels and profit. You simply watch to see if the ball keeps dropping from a particular part of the rim.

Odds are, you probably won’t make much, if any, money through this method either. But Small’s advice is fun to follow and gives you a quicker path towards detecting bias.

Michael Stevens

Michael Stevens has been researching and writing topics involving the gambling industry for well over a decade now and is considered an expert on all things casino and sports betting. Michael has been writing for since early 2016. ...

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