205/45R17 tire size
205/45R17 is a metric size: 24.3" tall, 8.1" wide, on a 17" rim — about a 24.5x8.00R17. The sidewall is 3.6" and the tire turns 831 times per mile.
205/45R17 specs
| Overall diameter (height) | 24.26" · 616 mm |
|---|---|
| Section width | 8.07" · 205 mm |
| Sidewall height | 3.63" · 92 mm (45% of width) |
| Rim diameter | 17" |
| Circumference | 76.23" · 1.936 m |
| Revolutions per mile | 831 (516 per km) |
| Inch (flotation) equivalent | 24.5x8.00R17 |
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 | |
|---|---|---|---|---|---|
| 225/45R17 common | 24.97" | +2.92% | +20 mm | 61.8 mph | compare → |
| 215/45R17 common | 24.62" | +1.46% | +10 mm | 60.9 mph | compare → |
| 205/50R17 common | 25.07" | +3.33% | 0 mm | 62.0 mph | compare → |
| 215/50R17 common | 25.46" | +4.95% | +10 mm | 63.0 mph | compare → |
| 235/45R17 common | 25.33" | +4.38% | +30 mm | 62.6 mph | compare → |
| 245/40R17 common | 24.72" | +1.87% | +40 mm | 61.1 mph | compare → |
| 255/40R17 common | 25.03" | +3.16% | +50 mm | 61.9 mph | compare → |
| 205/40R17 | 23.46" | -3.33% | 0 mm | 58.0 mph | compare → |
| 235/40R17 | 24.40" | +0.57% | +30 mm | 60.3 mph | compare → |
| 215/40R17 | 23.77" | -2.03% | +10 mm | 58.8 mph | compare → |
| 275/35R17 | 24.58" | +1.30% | +70 mm | 60.8 mph | calculate → |
| 225/40R17 | 24.09" | -0.73% | +20 mm | 59.6 mph | calculate → |
| 265/40R17 | 25.35" | +4.46% | +60 mm | 62.7 mph | calculate → |
| 195/45R17 | 23.91" | -1.46% | -10 mm | 59.1 mph | calculate → |
| 295/35R17 | 25.13" | +3.57% | +90 mm | 62.1 mph | calculate → |
| 245/35R17 | 23.75" | -2.11% | +40 mm | 58.7 mph | calculate → |
| 145/70R17 | 24.99" | +3.00% | -60 mm | 61.8 mph | calculate → |
| 195/40R17 | 23.14" | -4.62% | -10 mm | 57.2 mph | calculate → |
| 225/35R17 | 23.20" | -4.38% | +20 mm | 57.4 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 | |
|---|---|---|---|---|---|
| 195/55R16 common | 24.44" | +0.75% | -10 mm | 60.4 mph | compare → |
| 205/50R16 | 24.07" | -0.80% | 0 mm | 59.5 mph | compare → |
| 205/40R18 | 24.46" | +0.80% | 0 mm | 60.5 mph | compare → |
| 225/35R18 | 24.20" | -0.26% | +20 mm | 59.8 mph | calculate → |
| 235/35R18 | 24.48" | +0.88% | +30 mm | 60.5 mph | calculate → |
| 175/60R16 | 24.27" | +0.02% | -30 mm | 60.0 mph | calculate → |
| 215/50R16 | 24.46" | +0.83% | +10 mm | 60.5 mph | calculate → |
Try another size against 205/45R17
Questions
What size is 205/45R17 in inches?
205/45R17 is about 24.3" tall and 8.1" wide on a 17-inch rim — roughly a 24.5x8.00R17 in inch sizing.
What does 205/45R17 mean?
205 mm section width, sidewall 45% of the width (3.63"), radial construction, 17-inch rim.
What tire sizes are equivalent to 205/45R17?
On the same 17" rim, within 3% of the diameter: 235/40R17 (+0.57%), 225/40R17 (-0.73%), 275/35R17 (+1.30%), 195/45R17 (-1.46%), 215/45R17 (+1.46%), 245/40R17 (+1.87%).
How many revolutions per mile does a 205/45R17 tire make?
About 831 revolutions per mile (circumference 76.2").
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.