235/55R17
Overall diameter 690.3 mm
235/55R17 — 690.3 mm tall, and what it swaps with
235/55R17 is 235 mm wide with a 55% sidewall on a 17-inch wheel. That sidewall is 129.25 mm, so the tyre stands 690.3 mm tall and turns 461.1 times per kilometre.
- Section width
- 235 mm
- Aspect ratio
- 55 %
- Wheel size
- 17 in (431.8 mm)
- Sidewall height
- 129.25 mm
- Overall diameter
- 690.3 mm (27.18 in)
- Circumference
- 2168.6 mm
- Turns per km
- 461.1
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.
215/60R17689.8 mm · -0.07% you go slower305/30R20691 mm · +0.1% you go faster235/50R18692.2 mm · +0.28% you go faster235/60R16688.4 mm · -0.28% you go slower265/35R20693.5 mm · +0.46% you go faster255/45R18686.7 mm · -0.52% you go slower255/40R19686.6 mm · -0.54% you go slower235/45R19694.1 mm · +0.55% you go faster255/35R20686.5 mm · -0.55% you go slower215/65R16685.9 mm · -0.64% you go slower225/45R19685.1 mm · -0.75% you go slower295/30R20685 mm · -0.77% you go slower
Same profile, different width
Other sizes for this wheel
17-inch wheels
205/40R17 595.8mm205/45R17 616.3mm205/50R17 636.8mm205/55R17 657.3mm215/45R17 625.3mm215/50R17 646.8mm215/55R17 668.3mm215/60R17 689.8mm215/65R17 711.3mm225/45R17 634.3mm225/50R17 656.8mm225/55R17 679.3mm225/60R17 701.8mm225/65R17 724.3mm235/45R17 643.3mm235/55R17 690.3mm235/60R17 713.8mm235/65R17 737.3mm245/45R17 652.3mm245/65R17 750.3mm245/70R17 774.8mm255/65R17 763.3mm265/65R17 776.3mm265/70R17 802.8mm
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 235/55R17?
690.3 mm — the 431.8 mm wheel plus the 129.25 mm sidewall at top and bottom.
Q. How many turns per kilometre does 235/55R17 make?
Its circumference is 2168.6 mm, so 461.1 turns.
Q. What can I swap it for?
12 sizes stay within 3% of its diameter — the closest is 215/60R17 at 689.8 mm.
Q. Why is the sidewall 129.25 mm?
Because it is 55% of the 235 mm width. The aspect ratio is a proportion of the width, not a length.