215/70 R15 vs 255/40 R19
215/70 R15 vs 255/40 R19
255/40 R19 stays within the configured tolerance for 215/70 R15: +0.7% diameter and +0.7% speedometer effect.
Fitment verdict
255/40 R19 stays within the configured tolerance for 215/70 R15: +0.7% diameter and +0.7% speedometer effect.
| Metric | This size: 215/70 R15 | Alternative: 255/40 R19 | Difference | Verdict |
|---|---|---|---|---|
| Overall diameter | 26.85 in | 27.03 in | +0.7% | Within tolerance |
| Section width | 8.46 in | 10.04 in | +1.57 in | Computed difference |
| Sidewall height | 5.93 in | 4.02 in | -1.91 in | Computed difference |
| Circumference | 84.35 in | 84.92 in | +0.7% | Within tolerance |
| Speedo | 0.0% | +0.7% | +0.7% | Within tolerance |
Compare sizes
Looks valid
Looks valid
Units
✓ Within toleranceDiameter +0.7% (+0.18 in) · US (~3%)
- Within tolerance · Diameter +0.7%.
- Speedo @ 60: 60 mph → 60.4 mph.
- Sidewall -1.91 in · Width +1.57 in.
Diameter+0.7%+0.18 in
Speedo @ 60+0.7%60 mph → 60.4 mph
Sidewall-1.91 inWidth +1.57 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 27.03 in+0.18 in
- Sidewall
- 5.93 in 4.02 in-1.91 in
- Width
- 8.46 in 10.04 in+1.57 in
- Circumference
- 84.35 in 84.92 in+0.7%
- Revs / mile
- 751 746
- Speedo @ 60
- 60 mph 60.4 mph+0.7%
- Current —
215/70 R15 - New —
255/40 R19 - Grounded to the road: the axle rises +0.09 in.
Result report
215/70 R15 255/40 R19 · Within tolerance
Use this size when shopping: 255/40 R19
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% |
215/70 R15 · 255/40 R19 · Methodology
What changed
- Reviewed deterministic geometry, load/speed references, sitemap inclusion and localized page shell.