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硬度計是測量物體硬度的儀器，表示材料抵抗硬物體壓入其表面的能力。它是金屬材料的重要性能指標之一。一般硬度越高，耐磨性越好。根據所測硬度單位：洛氏硬度計、維氏硬度計、顯微硬度計、布氏硬度計、邵氏硬度計、巴氏硬度計、里氏硬度計、韋氏硬度計、肖氏硬度計、布洛維硬度。根據使用方式：便攜式硬度計、臺式硬度計。

進口硬度計，美國Check-Line RX-1600-A120專為冰鞋行業而設計，測量滑板輪的硬度。

The new Checkline RX-1600-A120 durometer features a scale specifically designed for testing the hardness of skateboard wheels that measures up to 120 on the "A" scale. Normal type A durometers only read to 100 however as wheel manufacturers began to satisfy the demａnd from riders who wanted harder wheels, wheels with hardness ratings over 100 A became available.

Our Check-Line RX-1600-A120 features a dial that reads from 20 to 120 on the "A" scale to allow wheel manufacturers and riders to accurately measure their wheels in the over 100 range.