265/70 R17 vs 275/55 R20
265/70 R17 vs 275/55 R20
275/55 R20 stays within the configured tolerance for 265/70 R17: +1.0% diameter and +1.0% speedometer effect.
Fitment verdict
275/55 R20 stays within the configured tolerance for 265/70 R17: +1.0% diameter and +1.0% speedometer effect.
| Metric | This size: 265/70 R17 | Alternative: 275/55 R20 | Difference | Verdict |
|---|---|---|---|---|
| Overall diameter | 31.61 in | 31.91 in | +1.0% | Within tolerance |
| Section width | 10.43 in | 10.83 in | +0.39 in | Computed difference |
| Sidewall height | 7.30 in | 5.95 in | -1.35 in | Computed difference |
| Circumference | 99.29 in | 100.25 in | +1.0% | Within tolerance |
| Speedo | 0.0% | +1.0% | +1.0% | Within tolerance |
Compare sizes
Looks valid
Looks valid
Units
✓ Within toleranceDiameter +1.0% (+0.30 in) · US (~3%)
- Within tolerance · Diameter +1.0%.
- Speedo @ 60: 60 mph → 60.6 mph.
- Sidewall -1.35 in · Width +0.39 in.
Diameter+1.0%+0.30 in
Speedo @ 60+1.0%60 mph → 60.6 mph
Sidewall-1.35 inWidth +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
- 31.61 in 31.91 in+0.30 in
- Sidewall
- 7.30 in 5.95 in-1.35 in
- Width
- 10.43 in 10.83 in+0.39 in
- Circumference
- 99.29 in 100.25 in+1.0%
- Revs / mile
- 638 632
- Speedo @ 60
- 60 mph 60.6 mph+1.0%
- Current —
265/70 R17 - New —
275/55 R20 - Grounded to the road: the axle rises +0.15 in.
Result report
265/70 R17 275/55 R20 · Within tolerance
Use this size when shopping: 275/55 R20
Geometric estimate. Always verify physical clearance (arches, suspension, brakes) before fitting.
Safe alternative sizes
| Size | Diameter | Speedo @ 100 | Use this |
|---|---|---|---|
−1″ 305/65R16 | +0.0% | +0.0% | |
OE 265/70R17 | +0.0% | +0.0% | |
+1″ 345/50R18 | -0.1% | -0.1% | |
+2″ 355/45R19 | -0.1% | -0.1% |
265/70 R17 · 275/55 R20 · Methodology
What changed
- Reviewed deterministic geometry, load/speed references, sitemap inclusion and localized page shell.