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  2. Tire code - Wikipedia

    en.wikipedia.org/wiki/Tire_code

    Starting in 1972 tires were specified by load rating, using a letter code. In practice, a higher load rating tire was also a wider tire. In this system a tire had a letter, optionally followed by "R" for radial tires, followed by the aspect ratio, a dash and the diameter – C78-15 or CR78-15 for bias and radial, respectively. Each diameter of ...

  3. Tyre label - Wikipedia

    en.wikipedia.org/wiki/Tyre_label

    Results of at least three runs of each test are combined to produce the wet grip index, yielding ratings of A - G (although D and G are not used for passenger cars), where A is the best. When buying tyres, it is worth noting that the braking distance (in the wet) from the reference speed of 85 km/h, to a standstill, varies by something of the ...

  4. Uniform Tire Quality Grading - Wikipedia

    en.wikipedia.org/wiki/Uniform_Tire_Quality_Grading

    Dedicated winter tires, also known as snow tires, are not required to have a UTQG rating. [5] Non-passenger car tires, such as those for motorcycles, buses, medium trucks and above along with trailers are also not required to have a UTQG rating, although FMVSS Standard 109 requires the following to be listed on the tire's sidewall: speed ...

  5. Low rolling resistance tire - Wikipedia

    en.wikipedia.org/wiki/Low_rolling_resistance_tire

    Low rolling resistance tires are designed to reduce the energy loss as a tire rolls, decreasing the required rolling effort — and in the case of automotive applications, improving vehicle fuel efficiency as approximately 5–15% of the fuel consumed by a typical gas car may be used to overcome rolling resistance.

  6. Zirconium - Wikipedia

    en.wikipedia.org/wiki/Zirconium

    90 Zr, 91 Zr, 92 Zr and 94 Zr are stable, although 94 Zr is predicted to undergo double beta decay (not observed experimentally) with a half-life of more than 1.10×10 17 years. 96 Zr has a half-life of 2.34×10 19 years, and is the longest-lived radioisotope of zirconium. Of these natural isotopes, 90 Zr is the most common, making up 51.45% of ...

  7. Chevrolet Corvette (C4) - Wikipedia

    en.wikipedia.org/wiki/Chevrolet_Corvette_(C4)

    -Tire jack is moved from rear spare tire well to a compartment behind the passenger seat. 1995: 20,742: $36,785: Last year of the ZR1. Gen II Opti-Spark distributor. Minor exterior restyling. Indy Pace Car special edition. 1996: 21,537: $37,225: Final year for the C4, Optional LT4 engine with 330 hp (246 kW). Independent dyno test showed the ...