215/65R15
Overall diameter 660.5 mm
215/65R15 — 660.5 mm tall, and what it swaps with
215/65R15 is 215 mm wide with a 65% sidewall on a 15-inch wheel. That sidewall is 139.75 mm, so the tyre stands 660.5 mm tall and turns 481.9 times per kilometre.
- Section width
- 215 mm
- Aspect ratio
- 65 %
- Wheel size
- 15 in (381 mm)
- Sidewall height
- 139.75 mm
- Overall diameter
- 660.5 mm (26 in)
- Circumference
- 2075 mm
- Turns per km
- 481.9
Sizes you can swap to
Only sizes whose overall diameter stays within 3% are listed. A different diameter covers a different distance per turn, and that gap becomes speedometer error.
255/30R20661 mm · +0.08% you go faster255/35R19661.1 mm · +0.09% you go faster255/40R18661.2 mm · +0.11% you go faster225/45R18659.7 mm · -0.12% you go slower295/30R19659.6 mm · -0.14% you go slower225/40R19662.6 mm · +0.32% you go faster205/55R17657.3 mm · -0.48% you go slower225/50R17656.8 mm · -0.56% you go slower215/60R16664.4 mm · +0.59% you go faster245/30R20655 mm · -0.83% you go slower245/35R19654.1 mm · -0.97% you go slower265/30R20667 mm · +0.98% you go faster
Same profile, different width
Other sizes for this wheel
How the code reads
The 205 is millimetres, the 55 is a percentage of that width, and only the 16 is inches. The R stands for radial construction.
How to read this
- The first three digits are the width in mm, the middle two are the aspect ratio in percent, the last two the wheel in inches.
- Sidewall height = width × aspect ÷ 100. For 205/55 that is 112.75 mm.
- Overall diameter = wheel diameter + twice the sidewall. A 16-inch wheel is 406.4 mm.
- Once the diameter shifts by more than 3%, the speedometer and odometer drift by the same amount.
Frequently asked questions
Q. What is the overall diameter of 215/65R15?
660.5 mm — the 381 mm wheel plus the 139.75 mm sidewall at top and bottom.
Q. How many turns per kilometre does 215/65R15 make?
Its circumference is 2075 mm, so 481.9 turns.
Q. What can I swap it for?
12 sizes stay within 3% of its diameter — the closest is 255/30R20 at 661 mm.
Q. Why is the sidewall 139.75 mm?
Because it is 65% of the 215 mm width. The aspect ratio is a proportion of the width, not a length.