195/40R17 tire size
195/40R17 is a metric size: 23.1" tall, 7.7" wide, on a 17" rim — about a 23x7.50R17. The sidewall is 3.1" and the tire turns 872 times per mile.
195/40R17 specs
| Overall diameter (height) | 23.14" · 588 mm |
|---|---|
| Section width | 7.68" · 195 mm |
| Sidewall height | 3.07" · 78 mm (40% of width) |
| Rim diameter | 17" |
| Circumference | 72.70" · 1.847 m |
| Revolutions per mile | 872 (542 per km) |
| Inch (flotation) equivalent | 23x7.50R17 |
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 | |
|---|---|---|---|---|---|
| 205/45R17 common | 24.26" | +4.85% | +10 mm | 62.9 mph | calculate → |
| 205/40R17 | 23.46" | +1.36% | +10 mm | 60.8 mph | calculate → |
| 215/40R17 | 23.77" | +2.72% | +20 mm | 61.6 mph | calculate → |
| 225/40R17 | 24.09" | +4.08% | +30 mm | 62.4 mph | calculate → |
| 195/45R17 | 23.91" | +3.32% | 0 mm | 62.0 mph | calculate → |
| 245/35R17 | 23.75" | +2.64% | +50 mm | 61.6 mph | calculate → |
| 225/35R17 | 23.20" | +0.26% | +30 mm | 60.2 mph | calculate → |
| 215/35R17 | 22.93" | -0.94% | +20 mm | 59.4 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 | |
|---|---|---|---|---|---|
| 205/45R16 | 23.26" | +0.53% | +10 mm | 60.3 mph | calculate → |
| 185/50R16 | 23.28" | +0.61% | -10 mm | 60.4 mph | calculate → |
Try another size against 195/40R17
Questions
What size is 195/40R17 in inches?
195/40R17 is about 23.1" tall and 7.7" wide on a 17-inch rim — roughly a 23x7.50R17 in inch sizing.
What does 195/40R17 mean?
195 mm section width, sidewall 40% of the width (3.07"), radial construction, 17-inch rim.
What tire sizes are equivalent to 195/40R17?
On the same 17" rim, within 3% of the diameter: 225/35R17 (+0.26%), 215/35R17 (-0.94%), 205/40R17 (+1.36%), 245/35R17 (+2.64%), 215/40R17 (+2.72%), 195/45R17 (+3.32%).
How many revolutions per mile does a 195/40R17 tire make?
About 872 revolutions per mile (circumference 72.7").
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.