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The Tweel airless tire design. The Tweel (a portmanteau of tire and wheel) is an airless tire design developed by the French tire company Michelin.Its significant advantage over pneumatic tires is that the Tweel does not use a bladder full of compressed air, and therefore cannot burst, leak pressure, or become flat.
Willys M38 Jeep with bar grip tyres. Bar grip tyres, or 'NDT' (Non-Directional Tire) in US military parlance, are an early tyre tread pattern developed for off-road use.. Bar grips are characterised by a solid rubber circumferential centre strip, with large solid cleat alternately to either side.
Airless tires, non-pneumatic tires (NPT), or flat-free tires are tires that are not supported by air pressure. [1] [2] [3] They can be used on small vehicles such as ride-on lawn mowers and motorized golf carts. They also are used on heavy equipment required to operate on sites where risk of tire punctures is high.
The reason regular tires have treads is to avoid hydroplaning when the surface of the road is wet. Therefore racing cars competing in dry conditions characteristically use tires without treads, often known as slicks. For example stock cars driven on professionally maintained NASCAR tracks use tires without treads, and with a thicker layer of ...
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The tundra-style tire has been independently invented at different times and places. In North America its post-World War II invention is credited to Canadian Welland Phipps, [1] potentially inspired by the Goodyear Tire & Rubber Company's pre-World War II development of their own, similar low-pressure "airwheel" as a complete wheel-rim and tire set — said to be of the "Musselman" type from U ...
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