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.
Ohderii Skate Skateboards are made of a High-quality Plastic deck which will not easily break even when pressed over by a car.  It comes with 3.125″ all aluminum alloy trucks, 59mm 78A super smooth PU wheels and ABEC-7 stainless steel bearings.  It is ready to use and you can easily store it in your backpack.  It has an average rating of 4.5 on Amazon.
My problem is Everytime I try to pop the back it’s not hard enough and I get no air. The article says to jump up so I do it physically and sometimes it seems to help. But when I watch skate videos and other skaters It doesn’t appear they are actually jumping up. They just seem to be popping the board. So should I physically jump? May sound stupid but it’s something I struggle with.
Punisher Skateboards Warphant measures 31 x 7.5 inch.  It has a 9-Ply Maple Black Board with Concave Deck and Double Kick Tail.  It comes with ABEC-3 Bearings, 5-inch V-style Heavy Duty Alloy Trucks, and Bases.  It uses 54 x 36 mm PU injection molded wheels and PE Riser Pad with PU Cushion and Punisher Logo.  It is perfect for learning and doing tricks.  It is best suited for riders who are 8 years old and above.  It has a 5 rating on Amazon.
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.)
Since its humble beginnings, Element was created out of passion and an unwavering dedication to making a positive difference. The tree continues to grow while it respects its deepest roots and embraces the landscape of skateboarding, and the lifestyle that surrounds it. From team riders to advocates, and product to marketing, Element is all inclusive, whose mission is to lead not follow, and leave an imprint deep enough, that it continues to make the world a better place.
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.