225/70 R15
What size is 225/70 R15?
225/70 R15 has an overall diameter of about 27.40 in, a section width of 8.86 in and a sidewall height of 6.20 in. It turns roughly 736 times per mile. Below are the exact figures plus in-tolerance plus/minus sizes you can switch to safely.
- Overall diameter: 27.40 in.
- Section width: 8.86 in.
- Sidewall height: 6.20 in.
- Revolutions: 457 /km · 736 /mi.
- In-tolerance sizes: 225/65 R16 (+0.4%).
Fitment verdict
225/65 R16 stays within the configured tolerance for 225/70 R15: +0.4% diameter and +0.4% speedometer effect.
| Metric | This size: 225/70 R15 | Alternative: 225/65 R16 | Difference | Verdict |
|---|---|---|---|---|
| Overall diameter | 27.40 in | 27.52 in | +0.4% | Within tolerance |
| Section width | 8.86 in | 8.86 in | 0.00 in | Computed difference |
| Sidewall height | 6.20 in | 5.76 in | -0.44 in | Computed difference |
| Circumference | 86.08 in | 86.44 in | +0.4% | Within tolerance |
| Speedo | 0.0% | +0.4% | +0.4% | 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 | 27.40 in |
|---|---|
| Section width | 8.86 in |
| Sidewall height | 6.20 in |
| Circumference | 86.08 in |
| Revolutions | 457 /km · 736 /mi |
In-tolerance sizes
Alternative sizes that stay within the safe diameter tolerance:
| Size | Diameter | Speedo | Verdict |
|---|---|---|---|
| 225/65 R16 | +0.4% | +0.4% | ✓ OK |
| 235/50 R18 | -0.5% | -0.5% | ✓ OK |
| 235/55 R17 | -0.8% | -0.8% | ✓ OK |
| 225/60 R17 | +0.8% | +0.8% | ✓ OK |
| 215/60 R17 | -0.9% | -0.9% | ✓ OK |
| 275/40 R19 | +0.9% | +0.9% | ✓ OK |
| 245/45 R19 | +1.0% | +1.0% | ✓ OK |
| 235/60 R16 | -1.1% | -1.1% | ✓ OK |
| 225/55 R18 | +1.3% | +1.3% | ✓ OK |
| 255/45 R18 | -1.3% | -1.3% | ✓ OK |
| 255/40 R19 | -1.4% | -1.4% | ✓ OK |
| 255/35 R20 | -1.4% | -1.4% | ✓ OK |
Compare sizes
- Within tolerance · Diameter +0.4%.
- Speedo @ 60: 60 mph → 60.3 mph.
- Sidewall -0.44 in · Width +0.00 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
- 27.40 in 27.52 in+0.11 in
- Sidewall
- 6.20 in 5.76 in-0.44 in
- Width
- 8.86 in 8.86 in+0.00 in
- Circumference
- 86.08 in 86.44 in+0.4%
- Revs / mile
- 736 733
- Speedo @ 60
- 60 mph 60.3 mph+0.4%
- Current —
225/70 R15 - New —
225/65 R16 - Grounded to the road: the axle rises +0.06 in.
Result report
225/70 R15 225/65 R16 · Within tolerance
Use this size when shopping: 225/65 R16
Geometric estimate. Always verify physical clearance (arches, suspension, brakes) before fitting.
Safe alternative sizes
| Size | Diameter | Speedo @ 100 | Use this |
|---|---|---|---|
−1″ 285/60R14 | +0.2% | +0.2% | |
OE 225/70R15 | +0.0% | +0.0% | |
+1″ 265/55R16 | +0.3% | +0.3% | |
+2″ 165/80R17 | -0.0% | -0.0% |
More tools
- How to read a tire size
- Plus sizing guide
- Speedometer error guide
- 225mm Section width guide
- /70 Aspect ratio guide
- Rim diameter 15"
- 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.