Sure, calculating the diameter of a tire involves understanding its components.
The diameter of a tire can be calculated using this formula:
\[ \text{Diameter} = \text{Wheel rim size (in inches)} + (\text{Aspect ratio} \times \text{Section width}) \times 2 / 25.4 + \text{Wheel diameter (in inches)} \]
Given:
- Wheel rim size (in inches) = 26 inches (from P305/30R26)
- Section width = 305 millimeters
- Aspect ratio = 30% (from P305/30R26)
Let's plug in the values:
\[ \text{Diameter} = 26 + (0.30 \times 305) \times 2 / 25.4 \]
Calculating:
\[ \text{Diameter} = 26 + (91.5 \times 2) / 25.4 \]
\[ \text{Diameter} = 26 + 184 / 25.4 \]
\[ \text{Diameter} = 26 + 7.2441 \]
\[ \text{Diameter} ≈ 33.2441 \text{ inches} \]
Therefore, the diameter of the modified tires (P305/30R26) is approximately 33.24 inches.