1. What is Wheel Size?

Wheel size is typically expressed as diameter x width with an offset value. It's a crucial specification when selecting wheels for your vehicle, affecting fitment, performance, and appearance.

2. How Does the Calculator Work?

The calculator uses the standard wheel size format:

Where:

• \( Diameter \) — Wheel diameter in inches
• \( Width \) — Wheel width in inches
• \( Offset \) — Wheel offset in millimeters

Explanation: The diameter and width determine the physical size of the wheel, while the offset affects how the wheel sits in relation to the vehicle's suspension components.

3. Importance of Wheel Size

Details: Correct wheel size is essential for proper vehicle handling, avoiding rubbing against suspension or body components, and maintaining accurate speedometer readings.

4. Using the Calculator

Tips: Enter diameter and width in inches, and offset in millimeters. All values must be positive numbers. The calculator will combine them into standard wheel size notation.

5. Frequently Asked Questions (FAQ)

Q1: What is wheel offset?
A: Offset is the distance between the wheel's mounting surface and its centerline, measured in millimeters. It determines how far in or out the wheel sits.

Q2: How does wheel size affect my vehicle?
A: Incorrect wheel size can affect handling, speedometer accuracy, fuel efficiency, and may cause rubbing against suspension or body components.

Q3: Can I use any wheel size for my vehicle?
A: No, you should consult your vehicle's specifications or a wheel fitment guide to determine compatible sizes.

Q4: What does 18x8.5 +35 mean?
A: This means an 18-inch diameter wheel, 8.5 inches wide, with a +35mm offset (the mounting surface is 35mm outward from the centerline).

Q5: How important is wheel width?
A: Wheel width affects tire fitment and contact patch. Too wide may cause rubbing, too narrow may not properly support the tire.