Just before a skater performs an ollie, there are three forces acting on the skateboard. One of these forces is the weight of the rider, shown here with two red arrows. Another is the force of gravity on the board itself, shown with a small black arrow. Finally, blue arrows show the force of the ground pushing up on the skateboard. These three forces balance out to zero. With no net force, the skateboard doesn't accelerate, but rolls along at a constant speed.
The grip tape found on a skateboard can actually be defined as the grainy sheet, which resembles sandpaper that also comes with a sticky underside. Such underside needs to adhere to the deck’s surfaces as a means of increasing traction or grip. No matter what skating style you use, the grip tape is extremely helpful in your attempt to stay on the board.
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 (55–85 mm) roll faster, and move more easily over cracks in pavement and are better for transition skateboarding. Smaller diameters (48–54 mm) keep the board closer to the ground, require less force to accelerate and produce a lower center of gravity which allows for a better response time, but also make for a slower top speed and are better for street skateboarding. Wheels also are available in a variety of hardnesses usually measured on the Shore durometer "A" scale. Again like car tires, wheels range from the very soft (about Shore A 75) to the very hard (about Shore A 101). As the A scale stops at 100, any wheels labeled 101A or higher are harder, but do not use the appropriate durometer scale. Some wheel manufacturers now use the "B" or "D" scales, which have a larger and more accurate range of hardness. Modern street skaters prefer medium-sized wheels (usually 51–54 mm), as small wheels with lighter trucks can make tricks like kickflips and other flip tricks easier by keeping the center of gravity of the skateboard closer to the deck, thus making the deck easier to spin. Street wheels are harder (A 100/A 101). Vertical ramp or "vert" skating requires larger wheels (usually 55–65 mm), as it involves higher speeds. Vert wheels are also usually slightly softer (A 98/ A 99), allowing them to maintain high speed on ramps without sliding. Slalom skating requires even larger wheels (60–75 mm) to sustain the highest speeds possible. 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 65 mm to 100 mm. 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 type of skating the rider wants to do will inform the board choice, which sometimes involves skating a non-popsicle shaped board. But if you are just starting out, you can simply start with the traditional popsicle shaped deck that you probably recognize. As you skate more and get to know what shapes you like or what kind of skateboarding you enjoy best, your decisions will take into account for company, shape, width, and style of riding. Until then, choosing a board by its graphic is totally acceptable. For an overview on types of skateboard decks and riding styles, check out our Skateboard Decks Section in our Buyer’s Guide. Once you find a deck you like, you can simply select the default wheels, trucks, bearings and grip tape or you have the option to make it a complete.
The Krown Rookie Skateboard Complete 7.5 comes with thick, sturdy 7-ply maple wood deck. It gives you more control and permits you to perform various tricks. It features carbon steel ABEC-3 bearings, aluminum trucks, bushings and 54mm x 34mm wheels. This board is perfect for kids who are 8 years and older. It has a maximum weight capacity of up to 220 lbs.
GREAT board. Great design graphics. The boards deck has a real POP to it that makes it GREAT for tricks and a AWESOME beginner board. Only problem is It's super slow and requires a lot of work to maintain speed or to pick up speed period. A simple $20 wheel barring upgrade will fix that and BOOM PERFECT board, PERFECT caved in deck. Only 4 stars because of the lack of speed. I prefer my boards ready out of the box already pre-upgraded, but for the price, no point in complaining. Like almost all new boards, u have to ajust the wheels and the flex of the board to customize it to your liking. You won't regret it. But order it with some "Lucky" or "Red bearings" and your set.