175/55R15 Tire Size Specifications
Complete dimensional breakdown in inches and millimeters, approved wheel rim widths, vehicle fitments, speedometer error tables, and safe plus-sizing alternatives.
175/55R15 Technical Dimension Table
Standardized measurements computed according to ETRTO & ISO 4000-1 passenger and commercial tire design formulas.
| Specification Property | Imperial (Inches / Miles) | Metric (Millimeters / Kilometers) |
|---|---|---|
| Overall Rolling Diameter | 22.58 in | 573.5 mm |
| Section Width (Cross-section) | 6.89 in | 175 mm |
| Sidewall Cushion Height | 3.79 in | 96.3 mm |
| Circumference (Rolling Distance) | 70.93 in | 1801.6 mm |
| Revolutions per Distance | 921 revs/mile | 572 revs/km |
| Wheel Rim Diameter | 15 in | 381.0 mm |
| Approved Rim Width Range | 4.7" – 6.1" | 119 – 155 mm |
| Measuring / Ideal Rim Width | 5.4 in | 137 mm |
| Aspect Ratio (Profile %) | 55% of section width | |
What 175/55R15 Is Typically Used For
Dimensions in this range are the mainstream touring fitment, tuned for ride comfort, efficiency and year-round availability.
To find the size your specific vehicle takes, check the placard on the driver-side door jamb or your owner's manual. Fitment depends on model year, trim, brake caliper clearance, wheel offset and suspension setup, so the correct size for your car is the one the manufacturer specifies.
Popular Comparisons with 175/55R15
Frequently Asked Questions about 175/55R15
What size is 175/55R15 in inches?
The 175/55R15 tire measures approximately 22.58" in overall diameter, 6.89" in section width (tread/sidewall cross-section), and is mounted on a 15" diameter wheel rim.
What rim width is recommended for 175/55R15?
The approved rim width range for 175/55R15 is 4.7" to 6.1" wide, with an ideal measuring rim width of 5.4" for optimal tread contact and even wear.
What are the closest safe alternative sizes for 175/55R15?
Always verify rolling diameter stays within ±3% of 22.58" to prevent transmission strain and speedometer inaccuracies.
How many revolutions per mile does 175/55R15 make?
A standard 175/55R15 tire rotates approximately 921 revolutions per mile (572 revs per kilometer) at normal inflation pressure and rolling radius.