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🛞 轮毂 ET 偏距计算器Wheel Offset Calculator
比较新旧两款轮毂的宽度和 ET 偏距，计算后距（backspacing）、前距，以及换装后轮胎内侧离悬挂更近或更远多少、外侧向外凸出或缩进多少毫米。Compare two wheels by width and offset (ET) to get each one's backspacing and front spacing, and how much closer the inside moves to the suspension and how far the outside pokes out or tucks in after the swap, in millimetres.
使用说明与常见问题How-to & FAQ
「轮毂 ET 偏距计算器」是什么？What is the Wheel Offset Calculator tool?
比较新旧两款轮毂的宽度和 ET 偏距，计算后距（backspacing）、前距，以及换装后轮胎内侧离悬挂更近或更远多少、外侧向外凸出或缩进多少毫米。Compare two wheels by width and offset (ET) to get each one's backspacing and front spacing, and how much closer the inside moves to the suspension and how far the outside pokes out or tucks in after the swap, in millimetres.
如何使用「轮毂 ET 偏距计算器」？How do I use the Wheel Offset Calculator tool?
在「轮毂 ET 偏距计算器」中，填写「原轮毂宽度（英寸）」、「原轮毂 ET（毫米）」、「新轮毂宽度（英寸）」、「新轮毂 ET（毫米）」等参数，结果会随输入实时计算并显示在下方。In the Wheel Offset Calculator: Fill in "Current wheel width (in)", "Current offset ET (mm)", "New wheel width (in)", "New offset ET (mm)"; results are recalculated instantly as you type.
ET 偏距是什么？What is wheel offset (ET)?
偏距是轮毂安装面到轮辋中心线的距离（毫米）。正偏距（ET+）表示安装面在中心线外侧，轮毂更「缩」在车里；负偏距则更向外凸。ET 越小，轮毂越往外。Offset is the distance in millimetres from the hub mounting face to the rim's centreline. Positive offset (ET+) puts the mounting face outboard of the centre, tucking the wheel in; negative offset pushes it out. The lower the ET, the further out the wheel sits.
后距怎么算？How is backspacing calculated?
后距 = 轮辋总宽 ÷ 2 + 偏距。轮辋总宽按标称宽度加 1 英寸估算，例如 8 英寸、ET35：(9 × 25.4) ÷ 2 + 35 = 149.3 毫米 ≈ 5.88 英寸；前距 = 总宽 − 后距。Backspacing = overall rim width ÷ 2 + offset, taking overall width as nominal width + 1 inch. For an 8-inch wheel at ET35: (9 × 25.4) ÷ 2 + 35 = 149.3 mm ≈ 5.88 in; front spacing = overall width − backspacing.
换装前要注意什么？What should I check before swapping?
内侧变近可能碰到悬挂、刹车卡钳，外侧凸出可能蹭翼子板，还会影响转向手感和轴承负荷。另外要确认 PCD、中心孔和刹车间隙，并遵守当地法规。Moving the inside in can hit the suspension or brake caliper, and extra poke can rub the fender; both can change steering feel and bearing load. Also check the bolt pattern (PCD), centre bore and brake clearance, and follow local rules.
「轮毂 ET 偏距计算器」免费吗？需要注册吗？Is the Wheel Offset Calculator free? Do I need an account?
「轮毂 ET 偏距计算器」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Wheel Offset Calculator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.