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Through tools like a drop tower (which is exactly what it sounds like), researchers can measure factors like acceleration, velocity, and impact energies, which are then used to compute concussion risk and an overall safety score

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Why Electric Bikes Are Taking Over Brisbanes Streets: A New Era of Urban Commuting Nov 11, 2025 Why Electric Bikes Are Taking Over Brisbanes Streets: A New Era of Urban Commuting Are you noticing more and more people zipping through Brisbanes traffic on sleek electric bikes lately

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Features Design The design of the new VX-Pro4 maintains the R75 Shape Concept in the areas above test line Even on the chin bar, which is below test line, the round, smooth and strong design continues with Arai's unique rounded shape This rounded shape, combined with a compact chin bar, reduces protrusions and fixed edges that are much less likely to catch or dig-in in an impact Strength The shell is constructed according to Arai's unique CLC (Complex Laminate Construction) design The main material is Arai's exclusive Super Fiber, which provides exceptional tensile strength and elasticity that not only passes but exceeds the stringent Arai in-house test standard Each and every shell is entirely made by hand by dedicated craftsmen Shell Shape The shell itself is consistently round and smooth, maintaining the R75 Shape Concept in areas above the acknowledged test line and influencing those below the test line Here, the rounded chin bar maintains the same compact shell length with the previous model, the VX-Pro3 The result is less protrusion, which has proven to be less likely to catch and dig-in during a spill Shell Material In order to maximize performance, Arai precisely assembles the shell from multiple proprietary components Super Fiber, one of the primary materials, provides 30% higher tensile strength and increased penetration resistance The CLC (Complex Laminate Construction) method demands precise and time-consuming assembly by master craftsmen from many individual pieces Even though the bare shell is not visible after paint and final assembly, each one exemplifies the experience and the dedication of the entire Arai family Chin Bar Vent Grill Installed on the uniquely rounded chin bar, the stainless mesh grill is now mounted from the outside under the exterior vent cap and can be easily removed for cleaning or damage replacement The vent cap is also designed to break away from the chin bar in the event of impact Air-Through Ducts The new Air-Through construction of the top front vent and top rear vent covers as well as the side-port air ducts are designed to offer greatly improved ventilation efficiency and are easier to clean and maintain those on the previous VX-Pro3 model Rear Duct The Air-Through rear duct center brace also functions as a goggle strap locator The diffusers can be removed or replaced quickly and easily by removing a single screw on the rear duct center brace Goggle Strap Locate r The goggle strap locator keeps the goggle strap in position even during aggressive, competitive riding The new top rear duct center brace, together with the side port cowlings, also assist in keeping the strap in position on the side and back areas New Peak The new peak is 14mm longer and 5mm wider than the previous model for improved ability to deflect roost and flying debris To compensate for increased lift, the air outlets on the new peak have been made larger as well Removable Neck Roll The all-new removable neck roll allows easy and convenient cleaning of the helmet Emergency Release System The revised Emergency Release cheek pad system has the release tab re-positioned and is easier to access by rescue staff WARNING: This product may contain chemicals known to the State of California to cause cancer, birth defects or other reproductive harm