285/35R23
Overall diameter 783.7 mm
285/35R23 — 783.7 mm tall, and what it swaps with
285/35R23 is 285 mm wide with a 35% sidewall on a 23-inch wheel. That sidewall is 99.75 mm, so the tyre stands 783.7 mm tall and turns 406.2 times per kilometre.
- Section width
- 285 mm
- Aspect ratio
- 35 %
- Wheel size
- 23 in (584.2 mm)
- Sidewall height
- 99.75 mm
- Overall diameter
- 783.7 mm (30.85 in)
- Circumference
- 2462.1 mm
- Turns per km
- 406.2
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.
325/35R22786.3 mm · +0.33% you go faster275/45R21780.9 mm · -0.36% you go slower285/40R22786.8 mm · +0.4% you go faster325/30R23779.2 mm · -0.57% you go slower275/40R22778.8 mm · -0.63% you go slower265/70R16777.4 mm · -0.8% you go slower295/35R23790.7 mm · +0.89% you go faster275/35R23776.7 mm · -0.89% you go slower265/65R17776.3 mm · -0.94% you go slower265/60R18775.2 mm · -1.08% you go slower245/70R17774.8 mm · -1.14% you go slower285/50R20793 mm · +1.19% 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 285/35R23?
783.7 mm — the 584.2 mm wheel plus the 99.75 mm sidewall at top and bottom.
Q. How many turns per kilometre does 285/35R23 make?
Its circumference is 2462.1 mm, so 406.2 turns.
Q. What can I swap it for?
12 sizes stay within 3% of its diameter — the closest is 325/35R22 at 786.3 mm.
Q. Why is the sidewall 99.75 mm?
Because it is 35% of the 285 mm width. The aspect ratio is a proportion of the width, not a length.