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The tyres are Michelin Pilot Sport 4S' with codes of 275/35 ZR 19 (100Y) for the front and 345/30 ZR 20 (106Y) for the rear. [38] The car comes with track focused Michelin Pilot Sport Cup 2 tyres when equipped with the Ghost package.
Michelin (/ ˈ m ɪ ʃ əl ɪ n, ˈ m ɪ tʃ əl ɪ n / MISH-əl-in, MITCH-əl-in, French:), in full Compagnie Générale des Établissements Michelin SCA ("General Company of the Michelin Enterprises P.L.S."), is a French multinational tyre manufacturing company based in Clermont-Ferrand in the Auvergne-Rhône-Alpes région of France.
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.
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The Michelin TRX, (and the related TDX), is a radial tire introduced by the Michelin Group in 1975. It is one of the first volume-produced low-profile tires. Although technologically advanced, and reasonably successful, the tire's requirement for a non-standard rim ultimately condemned it to a relatively short commercial life.
The tires have dimensions of 275/30ZR20 at the front and 345/25ZR21 at the rear, and the Z07 Performance Package comes standard with Michelin Cup 2 R ZP performance tires. [44] Chevrolet claims that the optional carbon fiber wheels, supplied by Australian manufacturer Carbon Revolution, [ 45 ] shave off 41 lb (19 kg) of unsprung weight .
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.
Budd partnered with Michelin to construct several rubber-tired stainless steel rail cars powered by gasoline and diesel engines. [7] These saw service with the Reading Company, Pennsylvania Railroad, and Texas and Pacific Railway. The cars were under-powered, the tires proved prone to blowouts and derailments, and the cars were unsuccessful. [8]