205/40R16 tire size
205/40R16 is a metric size: 22.5" tall, 8.1" wide, on a 16" rim — about a 22.5x8.00R16. The sidewall is 3.2" and the tire turns 898 times per mile.
205/40R16 specs
| Overall diameter (height) | 22.46" · 570 mm |
|---|---|
| Section width | 8.07" · 205 mm |
| Sidewall height | 3.23" · 82 mm (40% of width) |
| Rim diameter | 16" |
| Circumference | 70.55" · 1.792 m |
| Revolutions per mile | 898 (558 per km) |
| Inch (flotation) equivalent | 22.5x8.00R16 |
Equivalent sizes on a 16" rim
Sizes within ±5% of the overall diameter. Green rows are inside the usual ±3% limit for keeping the speedometer, ABS and gearing right; red rows are bigger changes that need clearance checks.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 205/45R16 | 23.26" | +3.59% | 0 mm | 62.2 mph | calculate → |
| 195/45R16 | 22.91" | +2.02% | -10 mm | 61.2 mph | calculate → |
| 185/50R16 | 23.28" | +3.68% | -20 mm | 62.2 mph | calculate → |
| 175/55R16 | 23.58" | +5.00% | -30 mm | 63.0 mph | calculate → |
| 195/40R16 | 22.14" | -1.40% | -10 mm | 59.2 mph | calculate → |
| 215/40R16 | 22.77" | +1.40% | +10 mm | 60.8 mph | calculate → |
| 175/50R16 | 22.89" | +1.93% | -30 mm | 61.2 mph | calculate → |
| 215/35R16 | 21.93" | -2.37% | +10 mm | 58.6 mph | calculate → |
Plus / minus sizing: 15" and 17" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 195/50R15 | 22.68" | +0.98% | -10 mm | 60.6 mph | calculate → |
| 175/55R15 | 22.58" | +0.54% | -30 mm | 60.3 mph | calculate → |
| 145/65R15 | 22.42" | -0.16% | -60 mm | 59.9 mph | calculate → |
| 155/60R15 | 22.32" | -0.60% | -50 mm | 59.6 mph | calculate → |
| 275/35R15 | 22.58" | +0.54% | +70 mm | 60.3 mph | calculate → |
Try another size against 205/40R16
Questions
What size is 205/40R16 in inches?
205/40R16 is about 22.5" tall and 8.1" wide on a 16-inch rim — roughly a 22.5x8.00R16 in inch sizing.
What does 205/40R16 mean?
205 mm section width, sidewall 40% of the width (3.23"), radial construction, 16-inch rim.
What tire sizes are equivalent to 205/40R16?
On the same 16" rim, within 3% of the diameter: 195/40R16 (-1.40%), 215/40R16 (+1.40%), 175/50R16 (+1.93%), 195/45R16 (+2.02%), 215/35R16 (-2.37%), 205/45R16 (+3.59%).
How many revolutions per mile does a 205/40R16 tire make?
About 898 revolutions per mile (circumference 70.5").
How these numbers are computed
Diameter = rim + 2 × sidewall, sidewall = width × aspect ÷ 100, circumference = π × diameter, revolutions per mile = 63,360 ÷ circumference. Real tires differ by brand by a few tenths of an inch. Last reviewed October 14, 2026.