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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. [24] 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.
The overall diameter of the tire is then the rim diameter plus twice the tire's section height. The ISO 5775-1 standard also defines procedures for measuring tires and for calculating from the marking the maximum dimensions of a tire, which are needed by designers to determine clearance distances to other bicycle components.
Maxxis Tyres and CST tires are wholly owned subsidiaries of Cheng Shin. [1] Maxxis tires used on a Taiwanese bike. The company began as a producer of bicycle tyres and has since expanded into other types of tyres, including for motor vehicles. In 2015 Cheng Shin had worldwide revenue of over $3.85 billion. [2]
Tire Manufacturers and Companies Company Country Found. Brands Aeolus [1] China: 1965 Aeolus Apollo Tyres India: 1972 Apollo, [2] Apollo Tyres South Africa, [a] Bearway, [3] Kaizen, Maloya, Regal, Vredestein: Birla Tyres India: 1991 Birla Tyre [4] Belshina Belarus: 1965 Belshina [5] Bridgestone Japan: 1931
In 2021, there were 622 traffic fatalities caused by a tire-related crash. (Only about 16 percent of new vehicles are equipped with run-flat tires, which allow you to drive on a flat tire for ...
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.
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Off-roading tires may use a different measurement scheme: Tread width × Outside diameter, followed by wheel size (all in inches) – for example 31×10.50R15 (787 mm × 267 mm R380 in metric designation). The size of the wheel, however, is denoted as 8.5 in × 20.0 in (220 mm × 510 mm).