225/45R17 tire size
225/45R17 is a metric size: 25.0" tall, 8.9" wide, on a 17" rim — about a 25x9.00R17. The sidewall is 4.0" and the tire turns 808 times per mile.
225/45R17 specs
| Overall diameter (height) | 24.97" · 634 mm |
|---|---|
| Section width | 8.86" · 225 mm |
| Sidewall height | 3.99" · 101 mm (45% of width) |
| Rim diameter | 17" |
| Circumference | 78.45" · 1.993 m |
| Revolutions per mile | 808 (502 per km) |
| Inch (flotation) equivalent | 25x9.00R17 |
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 | |
|---|---|---|---|---|---|
| 225/50R17 common | 25.86" | +3.55% | 0 mm | 62.1 mph | compare → |
| 215/45R17 common | 24.62" | -1.42% | -10 mm | 59.1 mph | compare → |
| 205/50R17 common | 25.07" | +0.39% | -20 mm | 60.2 mph | compare → |
| 215/50R17 common | 25.46" | +1.97% | -10 mm | 61.2 mph | compare → |
| 235/45R17 common | 25.33" | +1.42% | +10 mm | 60.9 mph | compare → |
| 245/45R17 common | 25.68" | +2.84% | +20 mm | 61.7 mph | compare → |
| 245/40R17 common | 24.72" | -1.02% | +20 mm | 59.4 mph | compare → |
| 205/45R17 common | 24.26" | -2.84% | -20 mm | 58.3 mph | compare → |
| 255/40R17 common | 25.03" | +0.24% | +30 mm | 60.1 mph | compare → |
| 205/55R17 | 25.88" | +3.63% | -20 mm | 62.2 mph | compare → |
| 275/40R17 | 25.66" | +2.76% | +50 mm | 61.7 mph | compare → |
| 235/40R17 | 24.40" | -2.29% | +10 mm | 58.6 mph | compare → |
| 255/45R17 | 26.04" | +4.26% | +30 mm | 62.6 mph | compare → |
| 315/35R17 | 25.68" | +2.84% | +90 mm | 61.7 mph | compare → |
| 215/40R17 | 23.77" | -4.81% | -10 mm | 57.1 mph | compare → |
| 275/35R17 | 24.58" | -1.58% | +50 mm | 59.1 mph | calculate → |
| 265/40R17 | 25.35" | +1.50% | +40 mm | 60.9 mph | calculate → |
| 155/70R17 | 25.54" | +2.29% | -70 mm | 61.4 mph | calculate → |
| 225/40R17 | 24.09" | -3.55% | 0 mm | 57.9 mph | calculate → |
| 285/40R17 | 25.98" | +4.02% | +60 mm | 62.4 mph | calculate → |
| 195/60R17 | 26.21" | +4.97% | -30 mm | 63.0 mph | calculate → |
| 295/35R17 | 25.13" | +0.63% | +70 mm | 60.4 mph | calculate → |
| 175/65R17 | 25.96" | +3.94% | -50 mm | 62.4 mph | calculate → |
| 195/45R17 | 23.91" | -4.26% | -30 mm | 57.4 mph | calculate → |
| 145/80R17 | 26.13" | +4.65% | -80 mm | 62.8 mph | calculate → |
| 145/70R17 | 24.99" | +0.08% | -80 mm | 60.0 mph | calculate → |
| 185/60R17 | 25.74" | +3.07% | -40 mm | 61.8 mph | calculate → |
| 26x6.00R17 | 26.00" | +4.11% | -73 mm | 62.5 mph | calculate → |
| 245/35R17 | 23.75" | -4.89% | +20 mm | 57.1 mph | calculate → |
| 165/70R17 | 26.09" | +4.49% | -60 mm | 62.7 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 | |
|---|---|---|---|---|---|
| 225/40R18 common | 25.09" | +0.46% | 0 mm | 60.3 mph | compare → |
| 205/55R16 common | 24.88" | -0.38% | -20 mm | 59.8 mph | compare → |
| 255/35R18 common | 25.03" | +0.22% | +30 mm | 60.1 mph | compare → |
| 225/50R16 common | 24.86" | -0.46% | 0 mm | 59.7 mph | compare → |
| 245/35R18 common | 24.75" | -0.88% | +20 mm | 59.5 mph | compare → |
| 215/40R18 | 24.77" | -0.80% | -10 mm | 59.5 mph | compare → |
| 295/30R18 | 24.97" | -0.02% | +70 mm | 60.0 mph | compare → |
| 285/30R18 | 24.73" | -0.96% | +60 mm | 59.4 mph | compare → |
| 195/60R16 | 25.21" | +0.96% | -30 mm | 60.6 mph | calculate → |
| 185/60R16 | 24.74" | -0.93% | -40 mm | 59.4 mph | calculate → |
| 305/30R18 | 25.20" | +0.93% | +80 mm | 60.6 mph | calculate → |
| 145/80R16 | 25.13" | +0.65% | -80 mm | 60.4 mph | calculate → |
Try another size against 225/45R17
Questions
What size is 225/45R17 in inches?
225/45R17 is about 25.0" tall and 8.9" wide on a 17-inch rim — roughly a 25x9.00R17 in inch sizing.
What does 225/45R17 mean?
225 mm section width, sidewall 45% of the width (3.99"), radial construction, 17-inch rim.
What tire sizes are equivalent to 225/45R17?
On the same 17" rim, within 3% of the diameter: 145/70R17 (+0.08%), 255/40R17 (+0.24%), 205/50R17 (+0.39%), 295/35R17 (+0.63%), 245/40R17 (-1.02%), 215/45R17 (-1.42%).
How many revolutions per mile does a 225/45R17 tire make?
About 808 revolutions per mile (circumference 78.5").
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.