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  2. Shore durometer - Wikipedia

    en.wikipedia.org/wiki/Shore_durometer

    Two inline skate wheels with different durometer – 85A and 83A Digital Shore hardness tester. The Shore durometer is a device for measuring the hardness of a material, typically of polymers. [1] Higher numbers on the scale indicate a greater resistance to indentation and thus harder materials. Lower numbers indicate less resistance and softer ...

  3. List of skateboarding terms - Wikipedia

    en.wikipedia.org/wiki/List_of_skateboarding_terms

    Wheels: Usually made of polyurethane and sized between 39 and 70 millimeters in diameter, their hardness is measured by durometer, a number ranging from 0 to 100. Soft wheels have a durometer of about 85, hard wheels have a durometer of 98 or higher. .63 mm wheels are usually reserved for longboards , which go significantly faster and benefit ...

  4. Hardness scales - Wikipedia

    en.wikipedia.org/wiki/Hardness_scales

    The Rockwell scale; The Durometer scale; The Barcol scale; ... Hardness scales may also refer to: Methods of measuring the deposit formation by hard water.

  5. Hardness comparison - Wikipedia

    en.wikipedia.org/wiki/Hardness_comparison

    ISO 18265: "Metallic materials — Conversion of hardness values" (2013) ASTM E140-12B(2019)e1: "Standard Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Superficial Hardness, Knoop Hardness, Scleroscope Hardness, and Leeb Hardness" (2019)

  6. Kryptonics (company) - Wikipedia

    en.wikipedia.org/wiki/Kryptonics_(company)

    Kryptonics Skateboards is an American manufacturer of Skateboards and Longboards founded in 1965 and originally manufactured polyurethane products for the mining and computer industry. In the mid-1970s, the company introduced the Kryptonics Star Trac line of wheels that drastically changed the functionality of skateboards.

  7. Inline skates - Wikipedia

    en.wikipedia.org/wiki/Inline_skates

    Urban skates Hockey skates. Inline skates are boots with wheels arranged in a single line from front to back, allowing a skater to roll along on these wheels. Inline skates are technically a type of roller skate, but most people associate the term roller skates with quad skates, another type of roller skate with a two-by-two wheel arrangement similar to a car.