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Modern road tires have several measurements associated with their size as specified by tire codes like 225/70R14. The first number in the code (e.g., "225") represents the nominal tire width in millimeters. This is followed by the aspect ratio (e.g.,"70"), which is the height of the sidewall expressed as a percentage of the nominal tire width.
The first drag racing slick was developed by M&H Tires (Marvin & Harry Tires) in the early 1950s. It was the only company in the world that produced and sold original drag racing tyres. Drag racing slicks vary in size, from slicks used on motorcycles to very wide ones used on "top fuel" dragsters.
Prior to 1964, tires were all made to a 90% aspect ratio. Tire size was specified as the tire width in inches and the diameter in inches – for example, 6.50-15. [29] From 1965 to the early 1970s, tires were made to an 80% aspect ratio. Tire size was again specified by width in inches and diameter in inches.
In 1989, Yokomo's TR-31 tires, only made available to Yokomo and Associated drivers, became a subject of scrutiny due to its size, given the speed its Yokomos and Associated were going. The tires, were 2 + 1 ⁄ 4 inches tall (equivalent to 22 inch in full scale) which was illegal under ROAR regulation (maximum 2 inches) though IFMAR did not ...
A machinist calculator is a hand-held calculator programmed with built-in formulas making it easy and quick for machinists to establish speeds, feeds and time without guesswork or conversion charts. Formulas may include revolutions per minute (RPM), surface feet per minute (SFM), inches per minute (IPM), feed per tooth (FPT).
The European Tyre and Rim Technical Organisation (ETRTO) exists to specify and harmonise sizes of rims and their associated pneumatic tyres across the European Union.ETRTO sizes apply to rims and tyres for vehicles of all types, including bicycles.
During the 1950s and 1960s, Formula One tyres were supplied by Dunlop, Englebert, Firestone, Continental and Goodyear.In 1958, Dunlop introduced its R5 racing tyre, replacing the cotton fabric of the earlier R1 to R4 tyres with nylon fabric, allowing for a reported 12 lb reduction in tyre weight. [3]
In motorsport, the racing setup, car setup or vehicle setup is the set of adjustments made to the vehicle in order to optimize its behaviour (performance, handling, reliability, etc.) for specific conditions. Vehicle setups are variable for a variety of reasons, ranging from weather, driver/rider preference and race track characteristics.