215/70 R15
What size is 215/70 R15?
215/70 R15 has an overall diameter of about 26.85 in, a section width of 8.46 in and a sidewall height of 5.93 in. It turns roughly 751 times per mile. Below are the exact figures plus in-tolerance plus/minus sizes you can switch to safely.
- Overall diameter: 26.85 in.
- Section width: 8.46 in.
- Sidewall height: 5.93 in.
- Revolutions: 467 /km · 751 /mi.
- In-tolerance sizes: 245/35 R20 (-0.4%).
Fitment verdict
245/35 R20 stays within the configured tolerance for 215/70 R15: -0.4% diameter and -0.4% speedometer effect.
| Metric | This size: 215/70 R15 | Alternative: 245/35 R20 | Difference | Verdict |
|---|---|---|---|---|
| Overall diameter | 26.85 in | 26.75 in | -0.4% | Within tolerance |
| Section width | 8.46 in | 9.65 in | +1.18 in | Computed difference |
| Sidewall height | 5.93 in | 3.38 in | -2.55 in | Computed difference |
| Circumference | 84.35 in | 84.04 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 | 26.85 in |
|---|---|
| Section width | 8.46 in |
| Sidewall height | 5.93 in |
| Circumference | 84.35 in |
| Revolutions | 467 /km · 751 /mi |
In-tolerance sizes
Alternative sizes that stay within the safe diameter tolerance:
| Size | Diameter | Speedo | Verdict |
|---|---|---|---|
| 245/35 R20 | -0.4% | -0.4% | ✓ OK |
| 225/55 R17 | -0.4% | -0.4% | ✓ OK |
| 245/40 R19 | -0.5% | -0.5% | ✓ OK |
| 215/65 R16 | +0.6% | +0.6% | ✓ OK |
| 245/45 R18 | -0.6% | -0.6% | ✓ OK |
| 255/35 R20 | +0.7% | +0.7% | ✓ OK |
| 255/40 R19 | +0.7% | +0.7% | ✓ OK |
| 255/45 R18 | +0.7% | +0.7% | ✓ OK |
| 225/60 R16 | -0.8% | -0.8% | ✓ OK |
| 235/60 R16 | +0.9% | +0.9% | ✓ OK |
| 215/60 R17 | +1.1% | +1.1% | ✓ OK |
| 235/55 R17 | +1.2% | +1.2% | ✓ OK |
Compare sizes
- Within tolerance · Diameter -0.4%.
- Speedo @ 60: 60 mph → 59.8 mph.
- Sidewall -2.55 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
- 26.85 in 26.75 in-0.10 in
- Sidewall
- 5.93 in 3.38 in-2.55 in
- Width
- 8.46 in 9.65 in+1.18 in
- Circumference
- 84.35 in 84.04 in-0.4%
- Revs / mile
- 751 754
- Speedo @ 60
- 60 mph 59.8 mph-0.4%
- Current —
215/70 R15 - New —
245/35 R20 - Grounded to the road: the axle rises -0.05 in.
Result report
215/70 R15 245/35 R20 · Within tolerance
Use this size when shopping: 245/35 R20
Geometric estimate. Always verify physical clearance (arches, suspension, brakes) before fitting.
Safe alternative sizes
| Size | Diameter | Speedo @ 100 | Use this |
|---|---|---|---|
−1″ 325/50R14 | -0.2% | -0.2% | |
OE 215/70R15 | +0.0% | +0.0% | |
+1″ 345/40R16 | +0.1% | +0.1% | |
+2″ 355/35R17 | -0.2% | -0.2% |
More tools
- How to read a tire size
- Plus sizing guide
- Speedometer error guide
- 215mm 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.