Skateboard wheels are usually made of polyurethane, a flexible rubber-like material. They are available in a range of hardness levels and sizes to meet the needs of different skaters. Enclosed ball-bearings in the wheels reduce friction for a smooth ride.
Skateboard wheels range from 48 to 85 millimeters in diameter and from 75 to 101 on the Shore durometer hardness scale. Higher numbers indicate harder wheels. Wheels in the 52- to 55-millimeter range with a hardness of 95 or higher work well for general purpose skateboarding. Larger, harder wheels are good for riding ramps and getting vertical height, while smaller, harder wheels facilitate technical tricks. Softer wheels are good for riding smoother on rough surfaces.Learn More
Ski jumpers typically go 60 mph or more. This speed is calculated when a ski jumper is going down the in-run, prior to taking off.Full Answer >
The object of curling is to guide a granite curling stone from one end of the ice rink to a marked target on the other side of the rink. Two teams of four compete against each other using two stones per player.Full Answer >
Kung fu principles can be learned online, but techniques are best applied through in-person practice. Pure Black Mantis Kung Fu is taught online through Learnkungfuonline.comFull Answer >
Some of the parts found under the hood of a car include the battery, engine, air filter, belts, hoses, oil filter, power steering fluid and windshield washer fluid. To ensure all parts and components under the hood are working efficiently, routine preventative maintenance is recommended.Full Answer >