225/55 R17 vs 255/40 R19
225/55 R17 vs 255/40 R19
255/40 R19 stays within the configured tolerance for 225/55 R17: +1.1% diameter and +1.1% speedometer effect.
Fitment verdict
255/40 R19 stays within the configured tolerance for 225/55 R17: +1.1% diameter and +1.1% speedometer effect.
| Metric | This size: 225/55 R17 | Alternative: 255/40 R19 | Difference | Verdict |
|---|---|---|---|---|
| Overall diameter | 26.74 in | 27.03 in | +1.1% | Within tolerance |
| Section width | 8.86 in | 10.04 in | +1.18 in | Computed difference |
| Sidewall height | 4.87 in | 4.02 in | -0.86 in | Computed difference |
| Circumference | 84.02 in | 84.92 in | +1.1% | Within tolerance |
| Speedo | 0.0% | +1.1% | +1.1% | Within tolerance |
Compare sizes
Looks valid
Looks valid
Units
✓ Within toleranceDiameter +1.1% (+0.29 in) · US (~3%)
- Within tolerance · Diameter +1.1%.
- Speedo @ 60: 60 mph → 60.6 mph.
- Sidewall -0.86 in · Width +1.18 in.
Diameter+1.1%+0.29 in
Speedo @ 60+1.1%60 mph → 60.6 mph
Sidewall-0.86 inWidth +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
- 26.74 in 27.03 in+0.29 in
- Sidewall
- 4.87 in 4.02 in-0.86 in
- Width
- 8.86 in 10.04 in+1.18 in
- Circumference
- 84.02 in 84.92 in+1.1%
- Revs / mile
- 754 746
- Speedo @ 60
- 60 mph 60.6 mph+1.1%
- Current —
225/55 R17 - New —
255/40 R19 - Grounded to the road: the axle rises +0.14 in.
Result report
225/55 R17 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″ 195/70R16 | +0.0% | +0.0% | |
OE 225/55R17 | +0.0% | +0.0% | |
+1″ 185/60R18 | -0.0% | -0.0% | |
+2″ 245/40R19 | -0.1% | -0.1% |
225/55 R17 · 255/40 R19 · Methodology
What changed
- Reviewed deterministic geometry, load/speed references, sitemap inclusion and localized page shell.