215/40R17 tire size
215/40R17 is a metric size: 23.8" tall, 8.5" wide, on a 17" rim — about a 24x8.50R17. The sidewall is 3.4" and the tire turns 848 times per mile.
215/40R17 specs
| Overall diameter (height) | 23.77" · 604 mm |
|---|---|
| Section width | 8.46" · 215 mm |
| Sidewall height | 3.39" · 86 mm (40% of width) |
| Rim diameter | 17" |
| Circumference | 74.68" · 1.897 m |
| Revolutions per mile | 848 (527 per km) |
| Inch (flotation) equivalent | 24x8.50R17 |
Equivalent sizes on a 17" 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 | |
|---|---|---|---|---|---|
| 215/45R17 common | 24.62" | +3.56% | 0 mm | 62.1 mph | compare → |
| 205/45R17 common | 24.26" | +2.07% | -10 mm | 61.2 mph | compare → |
| 245/40R17 common | 24.72" | +3.97% | +30 mm | 62.4 mph | compare → |
| 205/40R17 | 23.46" | -1.32% | -10 mm | 59.2 mph | compare → |
| 235/40R17 | 24.40" | +2.65% | +20 mm | 61.6 mph | compare → |
| 275/35R17 | 24.58" | +3.40% | +60 mm | 62.0 mph | calculate → |
| 225/40R17 | 24.09" | +1.32% | +10 mm | 60.8 mph | calculate → |
| 195/45R17 | 23.91" | +0.58% | -20 mm | 60.3 mph | calculate → |
| 245/35R17 | 23.75" | -0.08% | +30 mm | 60.0 mph | calculate → |
| 195/40R17 | 23.14" | -2.65% | -20 mm | 58.4 mph | calculate → |
| 225/35R17 | 23.20" | -2.40% | +10 mm | 58.6 mph | calculate → |
| 215/35R17 | 22.93" | -3.56% | 0 mm | 57.9 mph | calculate → |
Plus / minus sizing: 16" and 18" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 195/50R16 | 23.68" | -0.40% | -20 mm | 59.8 mph | compare → |
| 215/35R18 | 23.93" | +0.65% | 0 mm | 60.4 mph | calculate → |
| 215/45R16 | 23.62" | -0.65% | 0 mm | 59.6 mph | calculate → |
| 225/45R16 | 23.97" | +0.84% | +10 mm | 60.5 mph | calculate → |
| 205/35R18 | 23.65" | -0.51% | -10 mm | 59.7 mph | calculate → |
| 175/55R16 | 23.58" | -0.81% | -40 mm | 59.5 mph | calculate → |
| 235/30R18 | 23.55" | -0.93% | +20 mm | 59.4 mph | calculate → |
Try another size against 215/40R17
Questions
What size is 215/40R17 in inches?
215/40R17 is about 23.8" tall and 8.5" wide on a 17-inch rim — roughly a 24x8.50R17 in inch sizing.
What does 215/40R17 mean?
215 mm section width, sidewall 40% of the width (3.39"), radial construction, 17-inch rim.
What tire sizes are equivalent to 215/40R17?
On the same 17" rim, within 3% of the diameter: 245/35R17 (-0.08%), 195/45R17 (+0.58%), 225/40R17 (+1.32%), 205/40R17 (-1.32%), 205/45R17 (+2.07%), 225/35R17 (-2.40%).
How many revolutions per mile does a 215/40R17 tire make?
About 848 revolutions per mile (circumference 74.7").
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.