205/70 R15
What size is 205/70 R15?
205/70 R15 has an overall diameter of about 26.30 in, a section width of 8.07 in and a sidewall height of 5.65 in. It turns roughly 767 times per mile. Below are the exact figures plus in-tolerance plus/minus sizes you can switch to safely.
- Overall diameter: 26.30 in.
- Section width: 8.07 in.
- Sidewall height: 5.65 in.
- Revolutions: 477 /km · 767 /mi.
- In-tolerance sizes: 215/55 R17 (+0.0%).
Fitment verdict
215/55 R17 stays within the configured tolerance for 205/70 R15: 0.0% diameter and 0.0% speedometer effect.
| Metric | This size: 205/70 R15 | Alternative: 215/55 R17 | Difference | Verdict |
|---|---|---|---|---|
| Overall diameter | 26.30 in | 26.31 in | 0.0% | Within tolerance |
| Section width | 8.07 in | 8.46 in | +0.39 in | Computed difference |
| Sidewall height | 5.65 in | 4.66 in | -0.99 in | Computed difference |
| Circumference | 82.62 in | 82.66 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 | 26.30 in |
|---|---|
| Section width | 8.07 in |
| Sidewall height | 5.65 in |
| Circumference | 82.62 in |
| Revolutions | 477 /km · 767 /mi |
In-tolerance sizes
Alternative sizes that stay within the safe diameter tolerance:
| Size | Diameter | Speedo | Verdict |
|---|---|---|---|
| 215/55 R17 | +0.0% | +0.0% | ✓ OK |
| 235/45 R18 | +0.1% | +0.1% | ✓ OK |
| 215/60 R16 | -0.5% | -0.5% | ✓ OK |
| 255/35 R19 | -1.0% | -1.0% | ✓ OK |
| 225/45 R18 | -1.2% | -1.2% | ✓ OK |
| 225/60 R16 | +1.3% | +1.3% | ✓ OK |
| 245/45 R18 | +1.5% | +1.5% | ✓ OK |
| 245/40 R19 | +1.6% | +1.6% | ✓ OK |
| 205/55 R17 | -1.6% | -1.6% | ✓ OK |
| 225/50 R17 | -1.7% | -1.7% | ✓ OK |
| 225/55 R17 | +1.7% | +1.7% | ✓ OK |
| 245/35 R20 | +1.7% | +1.7% | ✓ OK |
Compare sizes
- Within tolerance · Diameter +0.0%.
- Speedo @ 60: 60 mph → 60.0 mph.
- Sidewall -0.99 in · Width +0.39 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
- 26.30 in 26.31 in+0.01 in
- Sidewall
- 5.65 in 4.66 in-0.99 in
- Width
- 8.07 in 8.46 in+0.39 in
- Circumference
- 82.62 in 82.66 in+0.0%
- Revs / mile
- 767 767
- Speedo @ 60
- 60 mph 60.0 mph+0.0%
- Current —
205/70 R15 - New —
215/55 R17 - Grounded to the road: the axle rises +0.01 in.
Result report
205/70 R15 215/55 R17 · Within tolerance
Use this size when shopping: 215/55 R17
Geometric estimate. Always verify physical clearance (arches, suspension, brakes) before fitting.
Safe alternative sizes
| Size | Diameter | Speedo @ 100 | Use this |
|---|---|---|---|
−1″ 195/80R14 | -0.1% | -0.1% | |
OE 205/70R15 | +0.0% | +0.0% | |
+1″ 175/75R16 | +0.1% | +0.1% | |
+2″ 295/40R17 | -0.0% | -0.0% |
More tools
- How to read a tire size
- Plus sizing guide
- Speedometer error guide
- 205mm 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.