There Are More Wheels Than Doors In the World
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There Are More Wheels Than Doors In the World

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There Are More Wheels Than Doors In the World
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Are there more wheels or doors in the world

When New Zealander Ryan Nixon asked Twitter users whether they thought there were more doors or wheels in the world, he probably didn’t expect to start an online war. But that’s exactly what happened after March 5, as social media users, statisticians, and mathematicians all tried to solve this seemingly unsolvable riddle.
Car insurance comparison super app Jerry is here to end the debate. As experts on all things car-related, we know a thing or two about wheels—and we’re here to prove that, yes, there are more wheels than doors in the world.

How many doors are there in the world?

Without getting too deep into the numbers, we can estimate that there are as many as 33 billion doors in the world, between houses, apartment buildings, vehicles, and the cabinets, closets, and other compartments inside them.
That’s a lot of doors! But how does it compare to the number of wheels? Let’s take a look.

How many wheels are there in the world?

Okay, it’s pretty much impossible to give an exact count of all the wheels that exist in the world. After all, we’re making more all the time, and have been ever since the first wheel was invented around 3,500 BCE.
About 152,971 passenger cars were manufactured in 2020 alone (that’s 17 a second!), and even Hot Wheels produces close to 15 cars every second! And that’s not taking into account all of the wheels turned out each day for bicycles, shopping carts, airplanes, office chairs, and non-Hot Wheels toys.
To get a decent estimate of the number of wheels in the world, let’s break down the different types of wheels.


The first car, the three-wheel Benz Patent Motor Car, was invented in 1886—and ever since, wheels have been a part of life.
There are 1.446 billion cars in the world today. Multiply that by four, the average number of wheels on a standard modern passenger car, and you’re looking at 5.784 billion wheels.
“But, wait,” you say (in a smug, anti-wheel voice). “Don’t most cars have the same number of doors and wheels?”
And it’s true: most of the cars manufactured in the world are sedans, four-door SUVs, and other cars with an apparent wheel-to-door ratio of 4:4. For instance, the Toyota Corolla, the best-selling car of all time with 37.5 million units sold, has four doors and four wheels—a wash, right?
Wrong. Most cars have the same number of doors and tires—but wheels are a very different matter. After all, every car has a steering wheel. The gears that run your engine? Those are wheels, too. In fact, your car is full of wheels, big and small, that unquestionably outnumber the doors.
Even if we knock off the four main wheels and limit our count to steering wheels and transmissions, that’s an average of six wheels per car. Do the math, and we’re talking 8.676 billion wheels—more wheels than people, let alone doors for them to walk through!

Toy wheels

Toys are another major source of wheels, from Hot Wheels cars to LEGOs to Tonka trucks, Razor scooters, and that Fisher-Price corn popper toy that toddlers push around.
Hot Wheels alone has sold more than six billion cars, meaning there are roughly 24 billion tiny wheels out there in the world—and these miniatures don’t have working doors, meaning that every one of those wheels stays in the county. Hasbro’s Tonka has sold millions of pint-sized construction vehicles, with over 15 million sales of the iconic yellow Mighty Dump Truck alone. Hello, 60 million more wheels.
We could keep going—but adding up the sales of every single toy car company is a task too gargantuan even for us. Suffice it to say that if the gears-and-steering-wheel argument didn’t convince you, the toy industry produces enough wheels every second to outnumber the world’s doors without a sweat.

Bicycles and motorcycles

Sometimes two wheels are all you need—just ask bicycle and motorcycle enthusiasts!
Bicycles have been around since German inventor Karl von Drais patented the first in 1817, and there are about 1 billion bicycles in the world today. Motorcycles, on the other hand, were invented by Gottlieb Daimler in 1885, and there are just 49 million today.
Between bicycles and motorcycles, we add at least 2 billion wheels—and that’s not taking into account gears!

Other wheels: shopping carts, trailers, and furniture

Between cars, toys, and other wheeled vehicles, it’s already clear that wheels outnumber doors. But if you’re still not convinced, take a look around your home and neighborhood.
Got an office chair in your spare room (thank you, work-from-home)? That’s an average of five wheels. Shopping carts, hand trucks, trailers, and baby strollers all have wheels (and no doors). If you’ve got any furniture in your home with casters, those count as wheels too—and, if we’re getting really technical about it, every single sliding drawer in your home requires at least a couple of wheels to operate.

The bottom line

We’re nowhere near an exact estimate of the total number of wheels in the world, but it doesn’t matter. Already, we’ve identified well over a possible 37 billion wheels in the world—way more than the number of doors.

Which country has the most wheels?

So it’s official: there are more wheels than doors in the world. But which country has the most?
That honor might go to China, which has an estimated 302 million cars alone (not counting other wheel sources). However, itty-bitty San Marino might have the world’s highest concentration of wheels, with 1,263 vehicles per 1,000 people. The country that drives the least, on the other hand, is Bangladesh, with just 4 vehicles per 1,000 people.
In the United States, you’re probably expecting to find the highest concentration of wheels in L.A.—and you’d be close! Car ownership statistics show that nearby Murrieta actually has the highest rate of vehicle ownership of any US city.
The city that drives the least, on the other hand, is (of course) New York City, where the MTA runs all hours of the day to get New Yorkers around the five boroughs. But at the bottom of every New York City subway car, amongst the garbage and the rats, you’ll find eight glorious wheels.

Why it matters

Haters will say that the door vs. wheel debate is a pointless argument, designed to waste time and turn friends against each other. But there may be a deeper truth beneath the madness. Every wheel represents progress, forward motion, and power. If your first answer to the question “are there more doors or wheels” was “wheels, of course,” you may be more tuned in to those elements of life, more open to new experiences, and more driven to explore the world.
Wheels are everywhere—and that’s a beautiful thing.

How to find affordable insurance for your wheels

No matter which side of the debate you fall on, car insurance comparison super app Jerry can help you find affordable car insurance for your wheels.
Compared to calculating the total number of wheels in the world, insurance shopping with Jerry is a breeze: just download the app, enter your information, and sit back and rest your brain while Jerry does the hard work. As a licensed broker, Jerry partners with 50+ top providers to find you the lowest rates possible.
Just how low? Well, the average Jerry user saves about $887 a year on car insurance. And in the end, that’s the number that matters the most.
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How Often Should You Change Your Furnace Air Filters?

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The air filters in your furnace play a vital role in filtering the air getting inside your home. It traps dust, debris, and other elements that reduce air quality. Since the air filters trap all the dust, it is crucial to change them frequently to improve the efficiency and quality of air in your home. However, when do you know it is time to change the air filters? The following information will help you.

How Often Should You Change Your Filters?

How often you change the filters depends on various things, like the efficiency of the HVAC, the manufacturer’s recommendations, and other characteristics. However, if your filter has a low MERV rating, you may need to change it often. That is why it is recommendable to get a high-efficient filter. You can get discount filters to ensure your HVAC has what it needs to perform well. You can also check the packaging to know how often the manufacturer recommends changing the filter.

It is also crucial to change the furnace filter based on the frequency of use of the HVAC. There are seasons, winter and summer when the system is used more often. With more use, more air that requires filtering is passing through. Therefore, ensure you check and change the filters during peak seasons and if you notice dirt buildup. If smokers or pets are in the house, your furnace needs to filter the air more. That means the filters will likely be clogged more due to the contaminants.

Signs the Filters Need Changing

There are things you can watch out for to know when your filter needs replacement. Here are several.

  • There is more dust than usual
  • The filters are grey, and a lot of dirt accumulating
  • Your HVCA has become inefficient
  • It has been a long time since you changed the filters

Why Should You Change the Furnace Filters?

The furnace does a great job of improving the comfort and quality of air in your home. Therefore, here are the benefits to enjoy.

  • Improved HVAC Efficiency

The filter is a vital part of the furnace. It is dirty due to clogged dirt and contaminants, and its ability to filter the air passing through the unit reduces. The entire system strains to clean the air, and its efficiency decreases. Cleaning the furnace filters allows proper cleaning of air passing through. It keeps the unit healthy, thus improving its efficiency.

  • Energy Efficiency

As mentioned, dirty filters put stress on the HVAC. The system works harder to clean the air, requiring more energy. However, with clean filters, less energy is used. Making your home more energy efficient.

  • More Comfort

The furnace cannot deliver good air quality when the air filters are clogged. Therefore, you may not get the best cool or warm you need in the house. Furthermore, straining of the unit may cause a malfunction. This causes discomfort.

  • Better Air Quality

The work of the filter is to remove contaminants in the air before it circulates in the house. If it cannot capture the pollutants, you are left with dirt air full of allergens and other health threats. That is why changing the filters is prudent.

Key Takeaways

Changing your furnace filter often is paramount to maintaining good indoor air quality. However, always ensure you buy high-quality filters from reputable dealers to ensure efficiency and prolonged use.

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Everything You Need to Know About Eco Products UK

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Eco-friendly products are becoming increasingly popular as the world focuses more on sustainability and environmental conservation. Eco-products are designed to reduce the environmental impact of production and consumption, minimize waste and emissions, and use renewable or recycled materials.


This guide provides an overview of eco-products, including their benefits, common materials used in eco-products, and how consumers can purchase them. With this information, you can make informed decisions about which eco-products to buy and how to incorporate them into your lifestyle. By choosing eco-friendly products, you can help reduce your environmental impact and make a positive difference for the planet.

What are Eco Products?

Eco-products, also known as green products, are items that have been designed and produced with the environment in mind. As a result, eco-products use fewer resources than their traditional counterparts, conserve energy, reduce emissions, and often use renewable or recycled materials.


Eco-products can include anything from furniture to clothing to electronics and come in wide varieties. Eco-products are designed to have a minimal impact on the environment, and by purchasing them, you can help reduce your environmental footprint.

Can You Make Eco Products at Home?

Many eco-products can be made home with simple supplies, such as fabric scraps and twine. For example, you can make reusable shopping bags from fabric scraps, create cleaning products using natural ingredients such as vinegar and baking soda, or make a portable solar power charger from a few household components. Making your eco-products is a great way to reduce waste and conserve energy. It also allows you to customize items to your unique needs and preferences.

What are the Benefits of Using Eco Products?

Eco-products provide numerous environmental benefits. By purchasing and using eco-products, you are helping to reduce emissions, conserve energy, limit waste, and protect natural resources.


Eco-products are often made from renewable or recycled materials, which helps to reduce the demand for new resources. Additionally, eco-products can be highly durable and require less maintenance than traditional products, which helps to reduce waste and save money in the long run.

Is it Better to Make Eco-Products at Home or Buy from the Market?

Homemade and store-bought eco-products offer advantages like reusable breast pads have their own. If you have the time and skills to create your eco-products, this is a great way to customize items for your needs and save money.


On the other hand, store-bought eco-products may be more convenient and of better quality than homemade ones. Ultimately, the best option is to choose the one that works best for you and your lifestyle.


Eco products UK are a great way to reduce environmental impact, conserve resources, and save money. With this guide, you better understand eco-products, their benefits, and how to make or purchase them.


With the correct information and a commitment to sustainability, you can help make a difference for the planet. The next step is integrating eco-products into your life and making a positive impact.

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The Best Bitcoin Casinos sites Compare Crypto Casinos

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The Best Bitcoin Casinos sites Compare Crypto Casinos
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Playing online casino games can be as fun as it is rewarding, but players have often felt constrained by the rules and regulations surrounding traditional casino sites.

The good news is that Bitcoin and other cryptocurrencies have made online gambling more accessible than ever. We’ll show you the best Bitcoin casino sites that you can join today.

Best Crypto Casinos Reviewed

Want to know more about what makes the top Bitcoin casinos stand out? Our reviews cover everything you need to know about these casinos’ features, games, bonuses, and more.

How We Select the Best Crypto Casinos

There’s a lot that goes into our ranking of the best Bitcoin casino sites. We’ll explain some of the key factors that we look at:

Secure Crypto Payments

Payments in cryptocurrency must be safe and secure in order for players to trust an online casino. We look for casinos that take security seriously and that have a history of protecting players’ funds.

Fast Deposits & Withdrawals

One of the benefits to online crypto casinos is that they can process deposits and withdrawals nearly instantly. Most of the of the best casino sites we reviewed can process payouts in minutes, although some take several days.

Crypto Bonuses & Promos

Crypto bonuses can be worth a lot of money, especially for new players. We look closely at the best crypto casinos’ bonus offers to see how much players can claim and how easy it is to meet the bonus requirements. We also look for ongoing promotions for returning players.

Low Crypto Banking Fees

Depositing and withdrawing crypto incurs blockchain fees, but casinos themselves shouldn’t charge additional fees. None of the best crypto casinos that we reviewed charge deposit or withdrawal fees for the cryptocurrencies they accept.

Fair Deposit & Withdrawal Limits

The best Bitcoin casinos should offer fair minimum deposit and withdrawal limits. At most of the casinos we reviewed, players can deposit as little as $10 or $20 in crypto. Players can also withdraw as little as $20 at a time, which is fair given that casinos incur some costs to process withdrawals.

Wide Range of Crypto Games

Of course, the range of games available to players at the best Bitcoin gambling sites matters. We look for the best crypto casino sites for Bitcoin casino games like blackjack and roulette, slots, and video poker. Many players also appreciate live dealer games, which offer a similar play environment to being in a physical casino.

Bitcoin Casino Software

It’s important that you use a Bitcoin casino site that uses high-quality software so that you can enjoy quality games with great graphics and smooth mechanics, without any lag. We also check a site that uses top Bitcoin casino software before we add it to our list of the best crypto casinos.

Bitcoin Casino App

Whether it’s crypto games or traditional games, these days the majority of players like to play on their mobile. This is why we only recommend the best Bitcoin casino apps that allow you to enjoy smooth casino gaming on your iPhone, Android, or tablet.

Good Betting Features & Resources

The best crypto casinos offer a wide range of gaming features, such as easy-to-navigate lobbies and simple tools for managing your funds. Many of the sites on our Bitcoin casino list also have detailed online help centers and 24/7 customer support.

Benefits of Using a Bitcoin Casino

Wondering why it’s worth using a Bitcoin casino app in the first place? There are several key benefits that betting with cryptocurrency can offer.

Fast Deposits and Withdrawals

One of the biggest benefits of using a Bitcoin casino app is that deposits and withdrawals are nearly instantaneous. There may be some delays due to the time it takes to process payments on the casino’s end, but there are no delays due to transaction processing by a bank or credit card company.

At nearly all of the best crypto casinos, crypto deposits are available to play with instantly. Withdrawals can reach a player’s crypto wallet in as little as 10 minutes.

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