215/40R16 tire size
215/40R16 is a metric size: 22.8" tall, 8.5" wide, on a 16" rim — about a 23x8.50R16. The sidewall is 3.4" and the tire turns 886 times per mile.
215/40R16 specs
| Overall diameter (height) | 22.77" · 578 mm |
|---|---|
| Section width | 8.46" · 215 mm |
| Sidewall height | 3.39" · 86 mm (40% of width) |
| Rim diameter | 16" |
| Circumference | 71.54" · 1.817 m |
| Revolutions per mile | 886 (550 per km) |
| Inch (flotation) equivalent | 23x8.50R16 |
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 | |
|---|---|---|---|---|---|
| 195/50R16 | 23.68" | +3.98% | -20 mm | 62.4 mph | calculate → |
| 205/45R16 | 23.26" | +2.16% | -10 mm | 61.3 mph | calculate → |
| 195/45R16 | 22.91" | +0.61% | -20 mm | 60.4 mph | calculate → |
| 215/45R16 | 23.62" | +3.72% | 0 mm | 62.2 mph | calculate → |
| 205/40R16 | 22.46" | -1.38% | -10 mm | 59.2 mph | calculate → |
| 185/50R16 | 23.28" | +2.25% | -30 mm | 61.3 mph | calculate → |
| 175/55R16 | 23.58" | +3.54% | -40 mm | 62.1 mph | calculate → |
| 175/50R16 | 22.89" | +0.52% | -40 mm | 60.3 mph | calculate → |
| 195/40R16 | 22.14" | -2.77% | -20 mm | 58.3 mph | calculate → |
| 215/35R16 | 21.93" | -3.72% | 0 mm | 57.8 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" | -0.41% | -20 mm | 59.8 mph | calculate → |
| 225/45R15 | 22.97" | +0.88% | +10 mm | 60.5 mph | calculate → |
| 245/40R15 | 22.72" | -0.24% | +30 mm | 59.9 mph | calculate → |
| 175/55R15 | 22.58" | -0.85% | -40 mm | 59.5 mph | calculate → |
| 165/60R15 | 22.80" | +0.10% | -50 mm | 60.1 mph | calculate → |
| 275/35R15 | 22.58" | -0.85% | +60 mm | 59.5 mph | calculate → |
| 215/35R17 | 22.93" | +0.67% | 0 mm | 60.4 mph | calculate → |
Try another size against 215/40R16
Questions
What size is 215/40R16 in inches?
215/40R16 is about 22.8" tall and 8.5" wide on a 16-inch rim — roughly a 23x8.50R16 in inch sizing.
What does 215/40R16 mean?
215 mm section width, sidewall 40% of the width (3.39"), radial construction, 16-inch rim.
What tire sizes are equivalent to 215/40R16?
On the same 16" rim, within 3% of the diameter: 175/50R16 (+0.52%), 195/45R16 (+0.61%), 205/40R16 (-1.38%), 205/45R16 (+2.16%), 185/50R16 (+2.25%), 195/40R16 (-2.77%).
How many revolutions per mile does a 215/40R16 tire make?
About 886 revolutions per mile (circumference 71.5").
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.