Wheel Offset & Backspace Calculator
Convert between wheel offset (mm) and backspace (inches) based on wheel width. Essential for checking wheel fitment and clearance for your vehicle.
Understanding wheel offset and backspace is crucial when selecting aftermarket wheels.
- **Offset (mm):** The distance from the wheel's mounting surface (hub) to its centerline. Positive offset means the mounting surface is towards the wheel's face (outer side), while negative offset means it's towards the inside (brake side).
- **Backspace (inches):** The distance from the wheel's mounting surface to the wheel's innermost lip/edge. It directly indicates how much space the wheel will take up towards the vehicle's suspension components.
This calculator allows you to convert between these two critical measurements if you know the wheel's width, helping you determine how a new wheel will fit.
- Enter the Wheel Width in inches. This is the width of the rim, usually measured between the bead seats.
- Select whether you want to calculate Offset (from Backspace) or Backspace (from Offset) using the dropdown menu.
- Depending on your selection:
- If calculating Offset, enter the known Backspace of the wheel in inches.
- If calculating Backspace, enter the known Offset of the wheel in millimeters. Remember that positive offset pushes the wheel further inward towards the suspension, while negative offset pushes it outward.
- Click the 'Calculate' button.
- The result for the unknown value (either offset in mm or backspace in inches) will be displayed.
All tools and information provided on TireCalculatorHub are for informational purposes only. Always consult with a qualified professional before making decisions about your vehicle's tires or modifications.
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