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Skateboard - Wikipedia. Skateboarder doing a hard- flip. A skateboard is a type of sports equipment or toy used primarily for the activity of skateboarding. It usually consists of a specially designed maplewood board combined with a polyurethane coating used for making smoother slides and stronger durability.

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Most skateboards are made with 7 plies of this wood. A skateboard is moved by pushing with one foot while the other remains on the board, or by pumping one's legs in structures such as a bowl or half pipe. A skateboard can also be used by simply standing on the deck while on a downward slope and allowing gravity to propel the board and rider. If the rider's leading foot is their right foot, he/she is said to ride . A skater is typically more comfortable pushing with their back foot; choosing to push with the front foot is commonly referred to as riding .

These no longer require the propelling of the skateboard by means of the feet; rather an electric motor propels the board, fed by an electric battery. There is no governing body that declares any regulations on what constitutes a skateboard or the parts from which it is assembled. Historically, the skateboard has conformed both to contemporary trends and to the ever- evolving array of stunts performed by riders/users, who require a certain functionality from the board. Of course, the board shape depends largely upon its desired function. Longboards are a type of skateboard with a longer wheelbase and larger, softer wheels. The two main types of skateboards are the longboard and the shortboard.

The shape of the board is also important: the skateboard must be concaved to perform tricks. Many parts exist with exotic or alternative constructions. A traditional complete skateboard consists of the deck (often with griptape applied on top to enhance traction), trucks (with urethane bushings), wheels (with sealed bearings), bushings, nuts and bolts to fasten the truck and wheel assembly to the bottom of the deck. Older decks also included plastic parts such as side, tail, and nose guards. Modern decks vary in size, but most are 7 to 1. Wider decks can be used for greater stability when skateboarding.

Standard skateboard decks are usually between 2. The underside of the deck can be printed with a design by the manufacturer, blank, or decorated by any other means. One of the first deck companies was called . Variants of the 1. Grip tape is applied to the top surface of a board to allow the rider's feet to grip the surface and help the skater stay on the board while doing tricks.

Grip tape is usually black, but is also available in many different colors such as pink, red, yellow, checkered, camo, and even clear. Often, they have designs die- cut to show the color of the board, or to display the board's company logo. Grip tape accumulates dirt and other substances that will inhibit grip, so use of a grip eraser or rubber eraser is necessary after riding through mud or with dirty shoes. Attached to the deck are two metal (usually made of aluminum alloy) trucks, which connect the wheels and bearings to the deck. The trucks are further composed of two parts.

The top part of the truck is screwed to the deck and is called the baseplate, and beneath it is the hanger. The axle runs through the hanger.

Between the baseplate and the hanger are bushings, also rubbers or grommets, that provide the cushion mechanism for turning the skateboard. The bushings cushion the truck when it turns. Free Pc Themes Free Download. The stiffer the bushings, the more resistant the skateboard is to turning. The softer the bushings, the easier it is to turn. Bushings come in varying shapes and urethane formulas as well as durometers, which may affect turning, rebound and durability. A bolt called a kingpin holds these parts together and fits inside the bushings. Thus by tightening or loosening the kingpin nut, the trucks can be adjusted loosely for better turning and tighter for more stability (useful when landing tricks).

Standard kingpin nut size is 3/8. The position of the hanger respect to the baseplate is also determined by the pivot, a rod that slots into the corresponding seat in the baseplate. The pivot stops the hanger from rotating around the kingpin. The pivot must allow some movement around the bushings and therefore is not a perfect fit. The space between the pivot and its seat in the baseplate is filled by a pivot cup, a plastic part that will take most of the wear and tear of the pivot and assist in centering the hanger. Captain Sim 757 Fmc Update. In general an axle width should be chosen that is close to the width of the deck it will be used with. Trucks that are too small can be hard to maintain stability and can cause wheel bite to occur when turning.

Longboard specific trucks are a more recent development. A longboard truck has the king pin laid at a more obtuse angle (usually between 3. Many longboard specific trucks also have a reverse kingpin arrangement with the kingpins facing outward.

The wheels of a skateboard are usually made of polyurethane, and come in many different sizes and shapes to suit different types of skating. Larger diameters (5. Smaller diameters (4.

Wheels also are available in a variety of hardnesses usually measured on the Shore durometer . Again like car tires, wheels range from the very soft (about Shore A 7. Shore A 1. 01). As the A scale stops at 1. A or higher are harder, but do not use the appropriate durometer scale. Some wheel manufacturers now use the . Modern street skaters prefer medium- sized wheels (usually 5. Street wheels are harder (A 1.

A 1. 01). Vertical ramp or . Vert wheels are also usually slightly softer (A 9. A 9. 9), allowing them to maintain high speed on ramps without sliding. Slalom skating requires even larger wheels (6.

They also need to be soft and have better grip to make the tight and frequent turns in slalom racing. Even larger wheels are used in longboarding and downhill skateboarding. Sizes range from 6. These extreme sizes of wheels almost always have cores of hard plastic that can be made thinner and lighter than a solid polyurethane wheel. They are often used by skateboard videographers as well, as the large soft wheels allow for smooth and easy movement over any terrain. The diagram shows an 8- balled- bearing whereas a skateboard bearing is typically 7- balled.

Bearings. With few exceptions, the bearings are the industrial standard . These are usually made of steel, though silicon nitride, a high- tech ceramic, is sometimes used. Many skateboard bearings are graded according to the ABEC scale. The scale starts with ABEC1 as the lowest, followed by 3, 5, 7, and 9. It is a common misconception that the higher ABECs are better for skateboarding, as the ABEC rating only measures tolerances, which do not necessarily apply to skateboards.

Bearing performance is determined on how well maintained the bearings are. Maintenance on bearings includes periodically cleaning and lubricating them . Bearings that are kept unmaintained have their performance greatly lowered and will soon need to be replaced. Bearing cleaning kits are commonly available on the market. The ABEC rating does not determine the speed or durability of a skateboard bearing. In particular, the ABEC rating says nothing about how well a bearing handles axial (side- to- side) loads, which are severe in most skateboard applications. Many companies do not show the ABEC rating, such as Bones Bearings, which makes bearings specifically for skateboarding, often marketed as .

Each bearing usually contains 7 steel or ceramic bearing balls, although other configurations are used as well. Hardware. They are used to attach the trucks (and any type of risers) to the board. Some sets have one different colored bolt to show which side is the nose of the skateboard. Hardware is available in various lengths for mounting trucks with or without risers. Optional components.

This allows the truck to twist further without causing wheel bite (when the wheel touches the deck and stops rotating).