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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 ...
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.
Tire tread wear: Worn tires will aquaplane more easily for lack of tread depth. Half-worn treads result in aquaplaning about 4.8–6.4 km/h (3–4 mph) lower than with full-tread tires. [6] Tire inflation pressure: Underinflation can cause a tire to deflect inward, raising the tire center and preventing the tread from clearing water.
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Aircraft tires generally operate at high pressures, up to 200 psi (14 bar; 1,400 kPa) for airliners, [2] and even higher for business jets [citation needed].The main landing gear on the Concorde was typically inflated to 232 psi (16.0 bar), whilst its tail bumper gear tires were as high as 294 psi (20.3 bar). [3]
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Retread (also known as recap or remold) is a re-manufacturing process for tires that replace the tread on worn tires. [1] [2] Retreading is applied to casings of spent tires that have been inspected and repaired. [3] It preserves about 90% of the material in spent tires and the material cost is about 20% compared to manufacturing a new one.
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