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Tire Size Converter
Metric (P215/65R15) ↔ Inches (28×8.5R15) · Diameter · Width · Sidewall
Tire Specifications
📏 28.0″ total diameter
215/65R15 = 215mm wide, 65% aspect ratio, 15" rim
📐 Section Width
215 mm
📏 Sidewall Height
5.5 in
🛞 Rim Diameter
15 in
⚙️ Revolutions per mile
720
📊 Aspect Ratio
65 %
🛞 Load Index
—
🚗 Common Tire Sizes by Vehicle Type
🚙 Compact Car (185/65R15)
🚗 Sedan (205/55R16)
🚙 SUV / Crossover (225/65R17)
🛻 Truck / SUV (265/70R17)
🛞 Large SUV / Truck (275/55R20)
🏎️ Sport Compact (195/55R15)
📖 Tire Size Decoder
P215/65R15 — P = Passenger vehicle
215 — Tire width in millimeters
65 — Aspect ratio (sidewall height = 65% of width)
R — Radial construction
15 — Rim diameter in inches
📖 Inch Tire Size Decoder
28×8.5R15 — 28" = total diameter, 8.5" = width, R = radial, 15" = rim
⚠️ Speedometer Accuracy Note
Changing tire size affects speedometer reading. Always consult a professional before changing tire sizes.
💡 Tire Buying Tips
🔍 Match all four tires for best handling
📅 Replace tires every 6 years regardless of tread
🪙 Check DOT code for manufacturing date
🌨️ Consider winter tires if you drive in snow
🚗 Metric ↔ Inch tire sizes
📏 Diameter, width, sidewall
⚙️ Revolutions per mile
📖 Tire size decoder