315/40R16 tire size
315/40R16 is a metric size: 25.9" tall, 12.4" wide, on a 16" rim — about a 26x12.50R16. The sidewall is 5.0" and the tire turns 778 times per mile.
315/40R16 specs
| Overall diameter (height) | 25.92" · 658 mm |
|---|---|
| Section width | 12.40" · 315 mm |
| Sidewall height | 4.96" · 126 mm (40% of width) |
| Rim diameter | 16" |
| Circumference | 81.43" · 2.068 m |
| Revolutions per mile | 778 (483 per km) |
| Inch (flotation) equivalent | 26x12.50R16 |
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" | -4.02% | -110 mm | 57.6 mph | calculate → |
| 215/55R16 common | 25.31" | -2.35% | -100 mm | 58.6 mph | calculate → |
| 215/65R16 common | 27.00" | +4.18% | -100 mm | 62.5 mph | calculate → |
| 215/60R16 common | 26.16" | +0.91% | -100 mm | 60.5 mph | calculate → |
| 205/60R16 common | 25.69" | -0.91% | -110 mm | 59.5 mph | calculate → |
| 205/65R16 common | 26.49" | +2.20% | -110 mm | 61.3 mph | calculate → |
| 225/60R16 common | 26.63" | +2.73% | -90 mm | 61.6 mph | calculate → |
| 225/50R16 common | 24.86" | -4.10% | -90 mm | 57.5 mph | calculate → |
| 235/60R16 common | 27.10" | +4.56% | -80 mm | 62.7 mph | calculate → |
| 225/55R16 | 25.74" | -0.68% | -90 mm | 59.6 mph | calculate → |
| 245/45R16 | 24.68" | -4.78% | -70 mm | 57.1 mph | calculate → |
| 245/50R16 | 25.65" | -1.06% | -70 mm | 59.4 mph | calculate → |
| 195/60R16 | 25.21" | -2.73% | -120 mm | 58.4 mph | calculate → |
| 185/60R16 | 24.74" | -4.56% | -130 mm | 57.3 mph | calculate → |
| 255/50R16 | 26.04" | +0.46% | -60 mm | 60.3 mph | calculate → |
| 145/90R16 | 26.28" | +1.37% | -170 mm | 60.8 mph | calculate → |
| 235/55R16 | 26.18" | +0.99% | -80 mm | 60.6 mph | calculate → |
| 155/90R16 | 26.98" | +4.10% | -160 mm | 62.5 mph | calculate → |
| 195/65R16 | 25.98" | +0.23% | -120 mm | 60.1 mph | calculate → |
| 275/45R16 | 25.74" | -0.68% | -40 mm | 59.6 mph | calculate → |
| 26x11.50R16 | 26.00" | +0.30% | -23 mm | 60.2 mph | calculate → |
| 265/45R16 | 25.39" | -2.05% | -50 mm | 58.8 mph | calculate → |
| 145/80R16 | 25.13" | -3.04% | -170 mm | 58.2 mph | calculate → |
| 355/40R16 | 27.18" | +4.86% | +40 mm | 62.9 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 | |
|---|---|---|---|---|---|
| 225/50R17 common | 25.86" | -0.24% | -90 mm | 59.9 mph | calculate → |
| 245/45R17 common | 25.68" | -0.93% | -70 mm | 59.4 mph | calculate → |
| 205/55R17 | 25.88" | -0.17% | -110 mm | 59.9 mph | calculate → |
| 215/65R15 | 26.00" | +0.32% | -100 mm | 60.2 mph | calculate → |
| 255/45R17 | 26.04" | +0.44% | -60 mm | 60.3 mph | calculate → |
| 315/35R17 | 25.68" | -0.93% | 0 mm | 59.4 mph | calculate → |
| 235/60R15 | 26.10" | +0.70% | -80 mm | 60.4 mph | calculate → |
| 275/50R15 | 25.83" | -0.36% | -40 mm | 59.8 mph | calculate → |
| 195/70R15 | 25.75" | -0.67% | -120 mm | 59.6 mph | calculate → |
| 285/40R17 | 25.98" | +0.21% | -30 mm | 60.1 mph | calculate → |
| 26x10.00R15 | 26.00" | +0.30% | -61 mm | 60.2 mph | calculate → |
| 175/65R17 | 25.96" | +0.14% | -140 mm | 60.1 mph | calculate → |
| 26x8.50R15 | 26.00" | +0.30% | -99 mm | 60.2 mph | calculate → |
| 145/80R17 | 26.13" | +0.82% | -170 mm | 60.5 mph | calculate → |
| 26x10.50R15 | 26.00" | +0.30% | -48 mm | 60.2 mph | calculate → |
| 26x12.00R15 | 26.00" | +0.30% | -10 mm | 60.2 mph | calculate → |
| 26x6.00R15 | 26.00" | +0.30% | -163 mm | 60.2 mph | calculate → |
| 26x6.00R17 | 26.00" | +0.30% | -163 mm | 60.2 mph | calculate → |
| 26x7.50R15 | 26.00" | +0.30% | -124 mm | 60.2 mph | calculate → |
| 26x8.00R15 | 26.00" | +0.30% | -112 mm | 60.2 mph | calculate → |
| 185/60R17 | 25.74" | -0.70% | -130 mm | 59.6 mph | calculate → |
| 26x11.50R15 | 26.00" | +0.30% | -23 mm | 60.2 mph | calculate → |
| 165/70R17 | 26.09" | +0.67% | -150 mm | 60.4 mph | calculate → |
Try another size against 315/40R16
Questions
What size is 315/40R16 in inches?
315/40R16 is about 25.9" tall and 12.4" wide on a 16-inch rim — roughly a 26x12.50R16 in inch sizing.
What does 315/40R16 mean?
315 mm section width, sidewall 40% of the width (4.96"), radial construction, 16-inch rim.
What tire sizes are equivalent to 315/40R16?
On the same 16" rim, within 3% of the diameter: 195/65R16 (+0.23%), 26x11.50R16 (+0.30%), 255/50R16 (+0.46%), 225/55R16 (-0.68%), 275/45R16 (-0.68%), 205/60R16 (-0.91%).
How many revolutions per mile does a 315/40R16 tire make?
About 778 revolutions per mile (circumference 81.4").
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.