Atobe Bonneville wheels..... In order to make the Best Possible wheel, there are many factors to consider. First off, Urethane is expensive and in a 76mm Solid Core wheel, you have a ton of material. There are many grades of Urethane. It's tempting for a brand to use a step down grade to save a buck. There is only one Urethane supplier in the world that makes the absolute best raw Urethane, DUPONT! It's expensive and good.
The next important factor is the blend. This is where you create your rebound and durometer. Rebound is the most important trait in a skateboard wheel. The more rebound, the faster the wheel goes and the more energy it will carry.
The wheel is only as good as the mold. Molding a longboard wheel is very critical. Shortboard wheels get cut on lathes. All sides get cut so the mold is not as critical. On a longboard wheel, the wheel comes out with a finished face so the molds must be perfect. Aluminum CNC machined molds with super high tolerances and hardened pin seats is the only way to get a perfect wheel. ALL wheels coming out of China are made with a very low grade Urethane and all that I have seen use epoxy or cast Urathane molds with low tolerances. This means that most, if not all the imported wheels are out-of-round, wobbly and very dead. They carry little energy. Do not ride them unless you are 2 years old and don't care about performance or quality.
The final ingrediant is "post curing". Urethane needs to be heated after it is poured and then cooled in a precise manner. Timed infra-red ovens and conveyors are a must on the production line! Like all good composites, Urethane reaches it's peek performance characteristics when properly post cured. This is a factor that many wheel producers over look. It takes time to cure a wheel and time is money. Imported wheels are not cured properly and are very inconsistant! Four wheels may not all be the same durometer or density. Right now, the best wheels in the world are coming out of two factories in the Southern California. Wheels made in the USA are the only wheels to buy. Since your wheels are keeping you connectected to the pavement, make them count! Get the best first!