315/25R23
Overall diameter 741.7 mm
315/25R23 — 741.7 mm tall, and what it swaps with
315/25R23 is 315 mm wide with a 25% sidewall on a 23-inch wheel. That sidewall is 78.75 mm, so the tyre stands 741.7 mm tall and turns 429.2 times per kilometre.
- Section width
- 315 mm
- Aspect ratio
- 25 %
- Wheel size
- 23 in (584.2 mm)
- Sidewall height
- 78.75 mm
- Overall diameter
- 741.7 mm (29.2 in)
- Circumference
- 2330.1 mm
- Turns per km
- 429.2
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.
305/30R22741.8 mm · +0.01% you go faster235/55R19741.1 mm · -0.08% you go slower295/35R21739.9 mm · -0.24% you go slower235/60R18739.2 mm · -0.34% you go slower265/35R22744.3 mm · +0.35% you go faster265/40R21745.4 mm · +0.5% you go faster255/55R18737.7 mm · -0.54% you go slower255/50R19737.6 mm · -0.55% you go slower255/45R20737.5 mm · -0.57% you go slower255/40R21737.4 mm · -0.58% you go slower235/65R17737.3 mm · -0.59% you go slower255/35R22737.3 mm · -0.59% you go slower
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 315/25R23?
741.7 mm — the 584.2 mm wheel plus the 78.75 mm sidewall at top and bottom.
Q. How many turns per kilometre does 315/25R23 make?
Its circumference is 2330.1 mm, so 429.2 turns.
Q. What can I swap it for?
12 sizes stay within 3% of its diameter — the closest is 305/30R22 at 741.8 mm.
Q. Why is the sidewall 78.75 mm?
Because it is 25% of the 315 mm width. The aspect ratio is a proportion of the width, not a length.