245/45R16 tire size
245/45R16 is a metric size: 24.7" tall, 9.6" wide, on a 16" rim — about a 24.5x9.50R16. The sidewall is 4.3" and the tire turns 817 times per mile.
245/45R16 specs
| Overall diameter (height) | 24.68" · 627 mm |
|---|---|
| Section width | 9.65" · 245 mm |
| Sidewall height | 4.34" · 110 mm (45% of width) |
| Rim diameter | 16" |
| Circumference | 77.54" · 1.969 m |
| Revolutions per mile | 817 (508 per km) |
| Inch (flotation) equivalent | 24.5x9.50R16 |
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 | |
|---|---|---|---|---|---|
| 205/55R16 common | 24.88" | +0.80% | -40 mm | 60.5 mph | compare → |
| 215/55R16 common | 25.31" | +2.55% | -30 mm | 61.5 mph | compare → |
| 205/60R16 common | 25.69" | +4.07% | -40 mm | 62.4 mph | compare → |
| 195/55R16 common | 24.44" | -0.96% | -50 mm | 59.4 mph | compare → |
| 225/50R16 common | 24.86" | +0.72% | -20 mm | 60.4 mph | compare → |
| 205/50R16 | 24.07" | -2.47% | -40 mm | 58.5 mph | compare → |
| 225/55R16 | 25.74" | +4.31% | -20 mm | 62.6 mph | compare → |
| 195/50R16 | 23.68" | -4.07% | -50 mm | 57.6 mph | compare → |
| 185/55R16 | 24.01" | -2.71% | -60 mm | 58.4 mph | compare → |
| 245/50R16 | 25.65" | +3.91% | 0 mm | 62.3 mph | compare → |
| 195/60R16 | 25.21" | +2.15% | -50 mm | 61.3 mph | calculate → |
| 185/60R16 | 24.74" | +0.24% | -60 mm | 60.1 mph | calculate → |
| 215/45R16 | 23.62" | -4.31% | -30 mm | 57.4 mph | calculate → |
| 225/45R16 | 23.97" | -2.87% | -20 mm | 58.3 mph | calculate → |
| 275/45R16 | 25.74" | +4.31% | +30 mm | 62.6 mph | calculate → |
| 175/60R16 | 24.27" | -1.67% | -70 mm | 59.0 mph | calculate → |
| 175/55R16 | 23.58" | -4.47% | -70 mm | 57.3 mph | calculate → |
| 215/50R16 | 24.46" | -0.88% | -30 mm | 59.5 mph | calculate → |
| 145/80R16 | 25.13" | +1.83% | -100 mm | 61.1 mph | calculate → |
| 265/45R16 | 25.39" | +2.87% | +20 mm | 61.7 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 | |
|---|---|---|---|---|---|
| 215/45R17 common | 24.62" | -0.26% | -30 mm | 59.8 mph | compare → |
| 245/40R17 common | 24.72" | +0.14% | 0 mm | 60.1 mph | compare → |
| 185/65R15 common | 24.47" | -0.86% | -60 mm | 59.5 mph | compare → |
| 205/60R15 | 24.69" | +0.02% | -40 mm | 60.0 mph | compare → |
| 275/35R17 | 24.58" | -0.41% | +30 mm | 59.8 mph | calculate → |
| 245/50R15 | 24.65" | -0.14% | 0 mm | 59.9 mph | calculate → |
| 345/35R15 | 24.51" | -0.70% | +100 mm | 59.6 mph | calculate → |
| 155/80R15 | 24.76" | +0.33% | -90 mm | 60.2 mph | calculate → |
| 24.5x8.00R15 | 24.50" | -0.73% | -42 mm | 59.6 mph | calculate → |
| 175/70R15 | 24.65" | -0.14% | -70 mm | 59.9 mph | calculate → |
| 225/55R15 | 24.74" | +0.26% | -20 mm | 60.2 mph | calculate → |
Try another size against 245/45R16
Questions
What size is 245/45R16 in inches?
245/45R16 is about 24.7" tall and 9.6" wide on a 16-inch rim — roughly a 24.5x9.50R16 in inch sizing.
What does 245/45R16 mean?
245 mm section width, sidewall 45% of the width (4.34"), radial construction, 16-inch rim.
What tire sizes are equivalent to 245/45R16?
On the same 16" rim, within 3% of the diameter: 185/60R16 (+0.24%), 225/50R16 (+0.72%), 205/55R16 (+0.80%), 215/50R16 (-0.88%), 195/55R16 (-0.96%), 175/60R16 (-1.67%).
How many revolutions per mile does a 245/45R16 tire make?
About 817 revolutions per mile (circumference 77.5").
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.