225/45 R17
What size is 225/45 R17?
225/45 R17 has an overall diameter of about 24.97 in, a section width of 8.86 in and a sidewall height of 3.99 in. It turns roughly 808 times per mile. Below are the exact figures plus in-tolerance plus/minus sizes you can switch to safely.
- Overall diameter: 24.97 in.
- Section width: 8.86 in.
- Sidewall height: 3.99 in.
- Revolutions: 502 /km · 808 /mi.
- In-tolerance sizes: 195/65 R15 (+0.0%).
Fitment verdict
195/65 R15 stays within the configured tolerance for 225/45 R17: 0.0% diameter and 0.0% speedometer effect.
| Metric | This size: 225/45 R17 | Alternative: 195/65 R15 | Difference | Verdict |
|---|---|---|---|---|
| Overall diameter | 24.97 in | 24.98 in | 0.0% | Within tolerance |
| Section width | 8.86 in | 7.68 in | -1.18 in | Computed difference |
| Sidewall height | 3.99 in | 4.99 in | +1.00 in | Computed difference |
| Circumference | 78.45 in | 78.48 in | 0.0% | Within tolerance |
| Speedo | 0.0% | 0.0% | 0.0% | Within tolerance |
Seasonal check
Planning a long summer drive?
Use the budget and running-cost tools before a trip, especially if the current tyres are worn or the replacement size changes diameter.
Specification
| Overall diameter | 24.97 in |
|---|---|
| Section width | 8.86 in |
| Sidewall height | 3.99 in |
| Circumference | 78.45 in |
| Revolutions | 502 /km · 808 /mi |
In-tolerance sizes
Alternative sizes that stay within the safe diameter tolerance:
| Size | Diameter | Speedo | Verdict |
|---|---|---|---|
| 195/65 R15 | +0.0% | +0.0% | ✓ OK |
| 255/35 R18 | +0.2% | +0.2% | ✓ OK |
| 205/55 R16 | -0.4% | -0.4% | ✓ OK |
| 225/50 R16 | -0.5% | -0.5% | ✓ OK |
| 225/40 R18 | +0.5% | +0.5% | ✓ OK |
| 195/70 R14 | -0.9% | -0.9% | ✓ OK |
| 225/35 R19 | +0.9% | +0.9% | ✓ OK |
| 195/60 R16 | +1.0% | +1.0% | ✓ OK |
| 205/60 R15 | -1.2% | -1.2% | ✓ OK |
| 215/55 R16 | +1.4% | +1.4% | ✓ OK |
| 215/45 R17 | -1.4% | -1.4% | ✓ OK |
| 235/45 R17 | +1.4% | +1.4% | ✓ OK |
Compare sizes
- Within tolerance · Diameter +0.0%.
- Speedo @ 60: 60 mph → 60.0 mph.
- Sidewall +1.00 in · Width -1.18 in.
How this result is calculated
Computed from nominal tire-size geometry: diameter, circumference and speedometer error. It does not check wheel-arch, suspension or brake clearance.
Methodology- Diameter
- 24.97 in 24.98 in+0.01 in
- Sidewall
- 3.99 in 4.99 in+1.00 in
- Width
- 8.86 in 7.68 in-1.18 in
- Circumference
- 78.45 in 78.48 in+0.0%
- Revs / mile
- 808 807
- Speedo @ 60
- 60 mph 60.0 mph+0.0%
- Current —
225/45 R17 - New —
195/65 R15 - Grounded to the road: the axle rises +0.00 in.
Result report
225/45 R17 195/65 R15 · Within tolerance
Use this size when shopping: 195/65 R15
Geometric estimate. Always verify physical clearance (arches, suspension, brakes) before fitting.
Safe alternative sizes
| Size | Diameter | Speedo @ 100 | Use this |
|---|---|---|---|
−1″ 285/40R16 | +0.0% | +0.0% | |
OE 225/45R17 | +0.0% | +0.0% | |
+1″ 295/30R18 | -0.0% | -0.0% | |
+2″ 305/25R19 | +0.1% | +0.1% |
More tools
- How to read a tire size
- Plus sizing guide
- Speedometer error guide
- 225mm Section width guide
- /45 Aspect ratio guide
- Rim diameter 17"
- Load index chart
- Speed rating chart
- Rim width and tyre fitment guide
- Wheel offset guide
- Wheel spacers guide
- Tyre pressure for heavy loads and towing
What changed
- Reviewed deterministic geometry, load/speed references, sitemap inclusion and localized page shell.