In longboarding, there are a couple different types of wheel shapes. Some are very specific to a certain style of riding while others have a variety of uses like the Dano's Downhill wheels that come as the default option on our Completes. The specific types of wheels are sliding, downhill, and cruising wheels.
Before choosing a wheel, keep a few things in mind. First, remember that a bigger wheel will mean the possibility of wheel- bite, more weight, and more effort to start pushing. However, a bigger wheel will roll faster and more smoothly over rougher terrain and debris. Second, most people looking for a good all-around wheel find that a 78a-81a durometer is best for a smooth and stable ride. Lastly, if you want a board that will cruise with ease over a longer distance you should look for a large core or "hub". A larger, dense core creates an overall higher roll speed. Some wheel companies even offer a "dual-durometer" wheel with a harder urethane wrapping around the core that will create the same feeling as a larger core.
See the following for more detailed wheel descriptions.
SLIDING WHEELS: Sliding wheels or "freeriding wheels" are designed to provide a little grip while still being able to slide sideways on demand. Typically they are narrower and have a harder urethane than downhill wheels. Also, sliding wheels often have a rounded profile along the edges of the wheels. This will help the wheel initiate and stay in the slide by not catching any sharp corners or "lips" on the ground. Some slide wheels will come with a stone ground finish to the contact patch area. This is quite popular because when a wheel gets ground down it slides a little bit easier by not having a perfectly flat surface with sticky urethane. However, some riders still prefer non-stone ground wheels so that they can get used to how a wheel is going perform during the "breaking-in" process.
DOWNHILL WHEELS: Downhill wheels are designed for two things; speed and grip. The speed comes from the size of the wheel (the bigger, the faster) and the urethane compound that it's made of. Downhill wheels also feature a wider profile with sharp edges. The increased width will provide more grip at high speed by maximizing the amount of urethane that is in contact with the ground at all times. Having sharp edges ensures that the wheel will not slip out at high speeds when taking corners. A common term for describing a downhill wheel is “conical” due to the inside shape of the wheel that leads to the core.
CRUISING WHEELS: A cruising wheel can take many forms. Usually they resemble downhill wheels by having a conical shape. Typically, cruising wheels don't need the most advanced urethane compound to provide a quality ride which often makes them a less expensive wheel. Most people like a 60-70mm wheel for cruising because it will provide a smooth ride and won't require the board to be really high off the ground.