To get higher ollies, I would suggesting resting your back foot on the very end of the tail and the front foot in the middle of the deck to allow for more slide. Popping as hard as you can and catching your board in the groove of the nose with you ankle practically resting in the groove will level the board out in the air. after this initial movement slide you feet back to the bolts on the tail and nose to ensure a clean landing.

When I was about 10, I broke my first skateboard by riding it into a ditch. A decade later, in college, I broke another skateboard within an hour of owning it (surely a record) in a short-lived attempt at doing an ollie. (Surprisingly, the store accepted a return on that board even though it was in two pieces.) Then I was gifted a really nice, high-quality skateboard. The first thing I did with it was ride it down a big hill, a valiant but ill-fated adventure which ended with me jumping off the skateboard, rolling down the grass, and arriving scraped up, deflated, and rather disoriented near the entrance to my college cafeteria. (In my defense, the wheels and ball-bearings on that skateboard had been pre-lubricated to minimize friction, and why would anyone do that, that's just crazy.)
Skateboarding is a very individual activity. There is no right or wrong way to skate. Skateboarding still hasn't stopped evolving, and skaters are coming up with new tricks all the time. Skateboarding has gone through its ups and downs over the years. However, since 2000, due to attention in the media and products like skateboarding video games, children's skateboards and commercialization, skateboarding has been pulled into the mainstream. As more interest and money has been invested into skateboarding, more skate parks, better skateboards have become available. In addition, the continuing interest has motivated skateboarding companies have to keep innovating and inventing new things. In 2020 Skateboarding will appear for the first-time in the Olympics in Tokyo, Japan.[4]
Any serious skateboarder will tell you that the ollie is the most fundamental skateboard trick. In fact, it's probably the first trick that you'll learn on your skateboard. They’re great for getting over obstacles, moving around on your board, or just looking cool. Know the right way to move your feet on the board and with a little bit of practice, you can learn to pull off the perfect ollie.
Grip tape is a sheet of paper or fabric with adhesive on one side and a surface similar to fine sandpaper on the other. 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.
This board includes professional assembly. All Krown skateboards arrived assembled and ready to ride straight out the box. The Rookie model includes heavy duty Aluminum 5.0 trucks, 52mm 99A high-rebound urethane wheels, precision speed Abec 7 bearings, high tensile phillips head mounting hardware, and 80 grit black grip tape. Each component meets the industry standards and are a common choice of skaters worldwide.
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. 

My fiancee purchased this via my account and he says that it has good concave shape and pop.Assembling was fairly simple, easier if you have a box cutter on hand to help with laying the grip tape. The deck was the best part but the bearings were good too. He thought the bushings were the worst, after about two hours of skating, both bushings were crushed and stuck in one direction. He's been skating for almost 13 years. Hope this helps!
As you jump into the air, your front foot needs to roll slightly inward, and with the outside of your foot, you want to guide the skateboard as it flies into the air. Some people describe this as dragging the side of your front foot up the skateboard – that’s more or less what is happening, but what you are doing is using your shoe and the grip tape on the board to pull the skateboard higher into the air with you, and guiding the skateboard to where you want it.
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