For a tire labeled P215/65R15, which statement about the aspect ratio is true?

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Multiple Choice

For a tire labeled P215/65R15, which statement about the aspect ratio is true?

Aspect ratio describes the sidewall height as a percentage of the tire’s width. In a P215/65R15, the 65 means the sidewall height is 65% of the 215 mm width. So the sidewall height is about 0.65 × 215 mm ≈ 140 mm. The overall tire diameter would then be roughly two sidewalls plus the wheel diameter (15 inches ≈ 381 mm), giving around 660 mm (about 26 inches). This number reflects sidewall height, not load capacity or speed rating, and it’s not the full width—that’s the 215 mm.

Aspect ratio describes the sidewall height as a percentage of the tire’s width. In a P215/65R15, the 65 means the sidewall height is 65% of the 215 mm width. So the sidewall height is about 0.65 × 215 mm ≈ 140 mm. The overall tire diameter would then be roughly two sidewalls plus the wheel diameter (15 inches ≈ 381 mm), giving around 660 mm (about 26 inches). This number reflects sidewall height, not load capacity or speed rating, and it’s not the full width—that’s the 215 mm.

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