3. Fast fast fast. Less friction touching the ground equates to less rolling resistance. Scientific tests at SDSU over 2 years of testing prove the frictional advantages.

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The width is increased, but the friction is decreased! The sine wave design provides three lips per wheel for superior lateral grip. When you want to slide, they break away smoothly and recover easily.

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4. Better slide control. The Shark Wheel spins when sliding, allowing the skater to completely control the slide. The 3 lips of the Shark Wheel skateboard wheels give predictable slides compared to 1 lip on a traditional wheel.

The wave pattern design allows for a thin contact patch touching the ground and therefore less friction, resulting in a quicker ride.

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An abnormal hemoglobin, termed Hb Savannah, was found in red cell hemolysate of a young Caucasian girl with severe hemolytic anemia. The presence of this unstable variant became evident when inclusion bodies appeared rapidly upon exposure of red cells to redox dyes and a large percentage of hemoglobin in hemolysate precipitated on warming to 65°C. Treatment of the hemoglobin with p-hydroxymercuribenzoate (PMB) caused a rapid dissociation into monomers; starch-gel electrophoresis of PMB-treated hemoglobin showed the presence of abnormal β-chains. Data from structural studies of isolated β-chains indicated substitution of a valyl residue for the normally occurring glycyl residue at position 24, which corresponds to helical residue B6. A similar substitution but with an arginine replacing the glycyl residue has been observed in Hb Riverdale-Bronx. The glycine to valine substitution will change the relationship of the B and the E helices which results in extensive conformational changes in the β-chain. This change presumably causes an increased dissociation of the hemoglobin molecule into dimers and probably monomers, and a decreased stability of the αβ-dimers. The hemoglobin abnormality may be the result of a fresh mutation because the abnormality is not present in the parents nor in any of the seven siblings.

Skateboard wheels were made out of clay, beginning in 1955. Not until 1975 did skateboard wheels get a material upgrade with polyurethane in 1975. Polyurethane increased the comfort of the ride, as well as the speed. There has not been a major innovation in skateboard wheels however since 1975...that is until Shark Wheel changed the geometery of the wheel itself in 2013. Not only did the Shark Wheel look radically different, but its skateboard wheels were scientifically proven by San Diego State, Mechanical Engineering Department to outperform the traditional skateboard wheel in nearly every single category including friction, speed, off-road ability, load capacity and even longevity.

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Scientifically designed to have more grip and slide control, less friction and more speed and more traction over various terrain.

Articles from Journal of Clinical Investigation are provided here courtesy of American Society for Clinical Investigation

The alternating pattern of grooves significantly reduces hydroplaning by channeling liquid, sand or gravel out and away from the surface of the wheel, allowing for a firm contact patch with the ground.

Dr. Bernat was the Director of the Program in Clinical Ethics at the Dartmouth-Hitchcock Medical Center. Previously he served as Assistant Dean of Clinical ...

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1. Rough Terrain. The #1 advantage of Shark Wheel skateboard wheels is all-terrain performance. The sine wave design tends to physically move small debris, pebbels and other small objects left and right out of the way. Traditional circular wheels tend to steamroll over objects, which can lead to accidents. The Shark Wheel design is also perfect for wet conditions funneling water away from the contact patch of the wheel adding grip. Scientifically proven by San Diego State University (SDSU), Mechanical Engineering Department in 2 years of testing.

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60mm skateboard wheels are best suited for skateboards and cruisers. Our 60mm wheels will fit most any board 33" and below.

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Download Catalogue · Services ... A symbol of dependability and flexible engineering solutions, NBC Bearings is the brand of National Engineering Industries.

May 2, 2024 — What Other Symptoms Indicate Bad Wheel Bearings? · Unusual noises coming from the wheels · Poor handling · Pulling to one side while driving or ...

The most common industrial application that uses radial ball bearings is an electric motor. This is because radial bearings carry loads and movement between the ...

Skateboard wheels are typically sized from 50mm-63mm in diameter. Skateboarding started in the 1940s, with people attaching roller skate wheels to wooden boxes. Currently, skateboarders use skateboard wheels for different purposes, ranging from street and bowl riding to pure transportation purposes. Other use skateboarding as a recreational activity or even as an art form. Skateboarding has been evolved dramatically over the years from an underground sport to the mainstream, with its first appearance in the Olympics at the 2020 Summer Olympics in Tokyo.

5. Longer Life. 15% longer when cruising. Shark Wheel skateboard wheels have multiple center points compared to 1 center point on normal wheels. Traditional wheels are prone to flatspots, wearing unevenly with only 1 center point. Shark Wheels are flatspot resistant. Scientifically proven by SDSU.

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2. Approach Angle. Shark Wheels skateboard wheels have a 30 degree approach angle that hit objects at an angle unlike a traditional wheel. The approach angle of Shark Wheel skateboard wheels noticeably reduces shock to skateboarders. When car drivers go over speeds bumps, they naturally know to move over the speed bump at an angle to smooth the ride.

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