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Wheels by Bones

Wheels  by  Bones

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Fun is always funnier if it is on wheels, but not any ones. In Fillow we help you to choose the ideal skateboard, depending on where and for what you are going to use it, always from the best skateboard brands, and at the best price.

How to choose skateboard wheels?

Skate wheels have changed a lot over time, both in sizes and materials, thanks to the continued development of this industry. 

Here’s a quick summary of what you should consider when choosing skateboard wheels. 


The sizes of the wheels are usually the diameter in millimeters, the most common are from 50 to 59mm. 

The smaller wheels have lower final speed, but higher acceleration, and vice versa. 

If you want to train technical maneuvers on smooth surfaces, you should prefer smaller wheels, around 52mm. 

If you prefer higher speed to move around or skate on ramps, the best sizes are 56-57mm. 

Remember that if you want to use very big wheels, you may need to use high trucks or risers, so they will not touch the deck in any case. 


Street and Park Skate Wheels

For all these reasons, the best skate wheels are smaller: lighter and lower skate, with better acceleration for tricks, etc.

If you are going to skate on smooth floors, and you want to train technical tricks, your ideal wheel’s size is between 50 and 53 mm. For more uneven floors, ramps or if you also use your skate to move around, slightly larger wheels are preferable, from 53 to 56 mm. 

Therefore, 53 mm would be the average diameter, that is why it is the preferred size for street skateboarding.

Ramps and Cruising Skate Wheels

For ramps, the ideal measures are between 56 and 60 mm, because in this case it is interesting to achieve maximum speed to reach heights. 

In cruising, larger wheels adapt better to any kind of surfaces, they offer greater speed and it is not so important that it’s harder to maneuver with them. 

In any case, remember that the trucks you use limit the size of the wheels you can use, because if you set up very big wheels on low trucks, without using risers, you could stop the wheels against the deck at the most inconvenient moment, with a painful outcome.


Classification according to hardness:

There are several ways to classify the wheels according to the hardness of the urethane from with they are made. 

The most common is the A-scale, used by most skateboard brands and most well-known skaters. The larger the number, the harder the wheel (101 A is harder than 95 A, for example).

This scale becomes somewhat imprecise for hardness from 101 A, so some brands like Bones use different or additional scales, such as the B or D scale. To find the correspondence between one hardness scale and another, Bones recommends adding 20 points to the value of B to get the value that would be in A. For example, wheels 83 B would be like 103 A, and are much harder than 101 A.


How to choose the hardness of your wheels?

As always, it depends on what you want your skate for, and your preferences. Hard wheels reach higher speeds, have higher acceleration and lower grip, but are for use on smooth floors. Soft wheels adapt better to the irregularities of the terrain, have a greater grip, but are slower. They are also mores susceptible to abrasion and deformation (the dreaded ‘flatspots’ of which we will speak later). 

So if you are going to do technical street tricks on smooth floors, harder wheels are better for you, because they are better for tricks and grinds. If you want to move around on all kinds of floors, the slightly softer wheels will be more comfortable for you, and they will offer greater grip. 

Soft  (75-92 A)

The softest wheels are used almost exclusively for cruisers, because they adapt perfectly to any type of terrains, and if you like to just skate around, with them you will have less inconvenience with the pebbles and parallelepipeds. They are also a good option if you are going to record videos.

Medium (92-95 A)

They are a bit faster that the soft ones, with a very good grip, but it is not so difficult to do tricks on them from time to time or get a little more speed on your walks. 

Hard (96-99 A)

With a reasonable speed, a bit of grip, but also with good maneuverability for tricks, these are the most recommended hardness for beginners. They serve for both street and park skating. 

High hardness (99-101 A and 83-84 B)

They are preferred by the most experienced skaters. They are faster and have a greater acceleration capability, so they are perfect for more technical skateboarding. However, on uneven floors, they may be uncomfortable.



Core / Standard

Skate wheels can have the central hole part reinforced with a harder plastic than the rest of the wheel, to keep the bearing in place (as when spacers are used). Those wheels that have this are called ‘core wheels’, and the rest are simply standard or ‘non-core’. 


Each wheel may have a different shape, with a variety of angles in the curvature of the profile and the width of the part that is in contact with the grounded. A smoother or even convex profile reduces weight to the wheel and prevents the curve of the profile from bothering you in your grinds and edges. As for the surface of contact with the ground, the larger it is, the better the grip and the lower the speed. And, on the contrary, the narrower it is, the more acceleration. 

You can find more information about the different shapes available in the section of each wheels’ brand. 


When the wheel stops being round and not longer rotates as well as the first day, we can say that it has a flatspot. It occurs when the material wears out by abrasion. This can happen, for example, when you put the wheels in a position perpendicular to the direction in which they are advancing, as usually made to brake. The wheels of higher quality and hardness such as some from Bones Wheels and Spitfire Wheels, are almost impossible to deform with normal use. 



In our skate shop you can choose from hundreds of models and brands of skate wheels from the most prestigious and professional brands in the sector. We have basic prices, cheap skate wheels, with very good performance and professional skate wheels. 

From our UK skate store we send throughout the European continent: United Kingdom, Denmark, Belgium, Luxemburg, Netherlands, London, Edinburgh, Liverpool, Glasgow, Manchester, Leeds, Brighton, Cardiff, Bristol, Cambridge, Sheffield, Southtampton, Plymouth.

Bones Bearings were born when in 1980 George Powell realizes the difficulty of finding good bearings for skate. In those years, the entire American market of bearings was monopolized by the Japanese bearings that, although they had worse quality that the Americans, were preferred due to their low cost and massive production. They had an acceptable quality, but they were not very fast. 

The other alternative was the German bearings, which were a bit better... but did not meet the needs of the skaters of the time. 

After analyzing that situation, Powell decided that he would travel through America and Europe searching better alternatives. 

The trip ended up in a small bearing manufacturer in Switzerland, whose bearings were faster than any others he had seen before, and just a bit more expensive than the Germans.

Powell worked with this factory to optimize their bearings for skateboarding. The standard metal seal was replaced by a high speed one, modeled on plastic, so it could be removed for maintenance. They left a ‘protective shield’ so skaters could remove it to clean and lubricate the bearings without the need for special tools. They adjusted the tolerances and measures and replaced the normal lubricant with a special one developed by them, the Bones Speed Cream. 

The result was the well-known Bones Swiss, and the birth of Bones Bearings, the most successful skate bearings brand in history. 

With George Powell leading the project (Powell Peralta) the brand was born in 1977 and is still one of the leading manufacturers of bearings and skate wheels, in terms of quality. 


Mr. Powell is an engineer and a designer, as well as a skater, so the research, development and testing of the products to achieve the best results have always been a priority for Bones. The brand seeks to get skate wheels more resistant to abrasion, although not the cheapest, and it does so by taking care of the quality of the materials, the manufacturing process, quality control, and of course the tests and comparisons that the riders of its team are always doing (Chris Joslin, Kevin Romar, Aaron Jaws Homoki, Evan Smith, Felipe Gustavo, David Gravette, Rodney Mullen and Ryan Decenzo).

Are bones wheels good? Yes of course!!

In this video you can see how they make the bones wheels for skates in their factory in Santa Barbara (California):

Bones uses different urethane formulas to adapt perfectly to each type of use that skate wheels have. You can also find wheels in different shapes and hardness. 

Bones Skateboards Wheels Hardness

This brand uses the B scale to measure the hardness (durometer), since they think it is much more accurate. The A scale goes from 1 to 100, so from 95 A it does not measure very accurately anymore. The D scale, on the other hand, is designed to measure very hard rubber and urethane, not the relatively soft material of the skate wheels, so it does not seem the most appropriate either. 

There is no exact correlation between the A and B scales, but broadly speaking, it would be enough to subtract 10 points from the number A to obtain B. 

There are mainly two durometers available: 

81B (aprox. 101 A): These wheels offer more grip, greater control, smoothness, high performance, resistance to abrasion and great durability.

84B /(aprox. 104 A): Choose these to get higher speed, bounce, slip capacity, abrasion resistance and longer durability. 

Bones Skateboard Wheels Formulas

Street Tech Formula TM (STF)

With this wheel the brand has proven its purpose of offering a higher rebound for greater speed and spectacular sliding properties, maintaining the resistance to abrasion (flattening) over any standard wheel.

Skatepark Formula TM (SPF)

This formula achieves a high quality urethane, specifically designed to prevent flattening by abrasion on both smooth and rugged surfaces, without losing the high rebound for a quick response in the tricks and a faster turn. They adhere better to rough surfaces while maintaining their strength, durability and speed. 

All-Terrain Formula (ATF)

Designed for the most rugged terrains, these soft urethane wheels offer speed and smoothness in the glide regardless of the quality of the soil. 

Within this formula we can find the ‘Rough Riders’, the most resistant of the brand to venture on less traveled roads. 

Bones Wheels Shapes

Bones has a wide variety of shapes for its wheels. 

Those made with the STF (Street Tech Formula) are available in five different shapes, named from V1 to V5. They are all symmetrical, so the assembly is reversible. Although you will have to try them all to decide which one you like the most, we tell you the most common uses of each of them: 


V1: They are the most versatile, for standard use, stable and durable. Available in the following sizes (mm): 50x30, 51x30, 52x31, 53x31, 54x32. The radious of the edge curve is 0.25”.

V2: They are thinner in the center than the V1 to make them lighter. Ideal for curbs, rails, grinds, etc. Available in these measurements (mm): 49x27, 51x38, 53x29. The radius of the edge curvature is 0.275”.

V3: For technical skate. They are the ones with the smallest surface in contact with the smallest floor, and the preferred by professional skaters who only practice street. They are lighter, have less friction, more speed, facilitate slides and give better results in tricks. Edge radius: 0.187”. Measures: 50x28, 52x29, 54x30.

V4: Also very versatile and for all purposes, but wider to offer more stability. The edge has a radius of 0.250” and are made in sizes 51x32”, 52x34, 53x34, 54x34 and 55x34 mm.

V5: They have a bigger radius of the edge, for a faster response. They are versatile, thinner at center, so they are lighter, and ideal for curbs and grinds. In addition the drawing will last more time. Edge radius: 0.50”. Available sizes: 51x30, 52x30, 53x31, 54x31, 55x32, 56x32, 58x33. 

The available shapes for the SPF (Skatepark Formula) are also five (from P1 to P5) and symmetrical. 


P1: Made to skate the streets, but maintaining the hardness of the SPF. They are smaller and thinner, more technical. Edge radius of 0.25 inches, available measures: 51x30, 52x31, 53x31, and 54x32 mm. 

P2: They have a bigger contact surface to the ground for more stability. They are designed for ramp, bowl, pool, half pipe, etc. The radius of the edge is bigger (0.5”) so the wheels can roll over the edge of the ramp (coping), and they are available in the sizes 56x37, 58x37 and 60x37 mm.

P3: They are widest of the brand, for bowl and vertical ramps. They offer greater stability and high speed. Soft edges, with 0.25” radius. They are made in 60x40 and 62x40 mm. 

P4: Smaller and thinner for a more technical skate. Versatile, they will work fine to skate the streets and for bowls. Edges with a curve of radius 0.25”, available sizes 52x34, 53x34, 54x34 and 55x34 mm.

P5: Narrower in the center and with an edge of bigger radius, these wheels are lighter and will impede you less in the grinds. They serve in bowls and vertical ramps. Thanks to its shape, the draw will last longer. They are preferred by most professional skateboarders in this discipline. Edge radius 0.5”, wheels in sizes 54x31, 56x32, 58x33 and 60x34 mm. 

Bones Wheels Quality

Bones has publicly shared the results of one of their quality control tests, the ‘drag test’. It consists of weighing the wheels, then making them roll at a certain speed for a certain time (always the same) and then weighing them again to determine the amount of material detached from the wheel in the process. Here is the table with the percentage of lost material for each model tested: 


The star products of this brand are the skate bearings. Thanks to its research and its persistence to get the fastest and more durable bearings in the market, we can say that it is the number one brand for this kind of products. Those skaters who buy Bones can rest assure that they have acquired a product of excellent quality, which has been tested by professional riders, who provide even more guarantee to the brand. 

Skate bearings, in general, are normally rated using the ABEC classification, in such way the higher it is, the more accurate the bearing will be. Bones, however, uses its own measurement system called Bones Skate Rated. These are the different Bones bearings that you can buy, and that you will always find in Fillow:

Bones Red:

It is the best seller of bearings every year in the United States, and also in our skate shop. This is thanks to the good quality of the bearing, which passes a double quality control before being out for sale, despite being considered the basic ones.


Bones Super Reds:

They are considered by Bones as the best medium-budget bearings available in the market. They have the same characteristics as the previous ones, but their balls are made of steel and have a more polished surface. Thanks to these improvements, the bearings are the same as the Bones Reds, but smoother and they will last longer. 

Bones Ceramic Super Reds:

These bearings are the same as the super reds but they have replaced the steel balls for some ceramics of the highest quality. These balls create less friction with what makes them faster than the super reds. On the other hand, these ceramic balls are responsible for removing dirt that enters the bearing by polishing the surface again. The hardness of the material also extends its useful life. 

Bones Swiss:

They are the bearings preferred by professional skaters for more than 33 years. They are designed for competitions and offer the fastest turns and the simplest maintenance. These bearings last much longer than any bearing with ABEC category.


Bones Super Swiss 6:

These bearings have the same qualities as the Bones Swiss but they have one ball less, so there are 6 balls inside each bearing, instead of 7 that is the standard number. 

By eliminating a ball, the acceleration and the speed are increased. These are the bearings chosen by many skaters who love ramps. 


Bones Swiss Labyrinth 2:

These bearings are very similar to Swiss, except that another protective shield has been added in such a way that it makes it very difficult for dirt to enter inside. The friction is reduced and the speed is increased. They also make the periods of time between each cleaning longer, and the price difference is not much. 


Bones Swiss Ceramics

This kind of bearings are the best, top quality in the world of skateboarding. 

They use ceramic balls from the brand Cerbec, considered the best in the world, the structure of the Bones Swiss bearings and they are lubricated with the Speed Cream of Bones. All these characteristics have as a result the fastest bearings, with the highest acceleration and that last longer.

Remember that the ceramic balls have a self-maintenance effect that lengthens their useful life and reduces the time of maintenance and cleaning, since the balls themselves remove the dirt and polish the surface continuously. 


To learn more about each model of Bones bearings and their characteristics, you can read all the information in our guide: All about Bones Bearings

Bones Skate Shop London – United Kingdom: Shipments to Edinburgh, Liverpool, Glasgow, Manchester, Leeds, Brighton, Cardiff, Bristol, Cambridge, Sheffield, Southtampton, Plymouth and other countries such as Denmark, Belgium, Luxemburg, Netherlands, France, Spain, Italy, Portugal.