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.
Don’t get your hopes shot if it takes you a while to get this down.  Once you know how to ollie, beginner skateboarders you can do any trick in the book with just a little bit of practice.  Once you get this trick down while your stationary, go practice while moving around a little bit, try to hop off a couple of curbs.   You’ll be skateboarding like a pro in no time.  Just keep at it.
Mini Cruisers have exploded in popularity in recent years. These short and skinny boards are may not have the versatility of a standard skateboard, allowing for a full range of tricks and travel. However, these compact boards are ideal for urban and college living where space for storage and riding are both minimal. If you want to ride a mini-cruiser, but you hate the plastic decks or you want to build your own, check out the Bamboo Skateboard mini cruiser deck.

Plan B sells boards with overall reliable attributes. They offer decks made from seven-ply wood. Powell is a longstanding company that founded the legendary Bones Brigade team, which kick-started Tony Hawk's career. Their skateboard designs change annually, but always look cool. Tony Hawk’s skate company is called Birdhouse. Their decks feature bird themes and have a thicker sixth layer of wood that makes it easier to jump and do flip tricks, which is ideal for vertical-style skateboarding. For environmentally-conscious skaters and fans of Bam Margera, buy a board from Element. They have variety on the technical side with their seven-ply boards and Helium decks. Their skateboards are made with an air pocket to be lightweight.

Learn how to ollie off of a ramp: Ramps are a LOT of fun to ollie off of, but they are also a great way to break something if you don't know what you're doing! I have a cousin who almost lost his arm because of how nastily he broke it while ollying off a ramp. But don't let that scare you - if you know what you're doing, ollying off ramps is great!

To summarize, a skateboarder's feet need to do two things successfully to complete an ollie. They need to provide a changing force to move the board correctly (so that the combined force of gravity and the skater's feet add up to the green arrows above), and they need to provide different amounts of force with each foot (shown by the red and blue arrows above) to steer and turn the board into the right orientation.
It wouldn’t be until the early 1980’s however, that a man named Rodney Mullen fully developed the skateboard ollie and brought it into vogue. Competing in the Rusty Harris contest in Whittier, California in 1982, Rodney Mullen used a back and forth motion on his skateboard to strike the back end of the board on the ground and using the front end to level the board out in mid-air – all from a flat surface. The audience’s jaws collectively hit the ground.

Shock pads are made of polyurethane and rubber. They are very similar to risers but vary in the fact that their sole purpose is to cushion the board from the trucks. Since the trucks are metal and the board wood, whenever the board hits the ground after doing a trick, the energy goes through the truck to the board ─ this has caused boards to crack, split, or even break in half, and shock pads were created to prevent this.
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.