265/70 R17 vs 275/65 R18
265/70 R17 vs 275/65 R18
275/65 R18 stays within the configured tolerance for 265/70 R17: +1.5% diameter and +1.5% speedometer effect.
Fitment verdict
275/65 R18 stays within the configured tolerance for 265/70 R17: +1.5% diameter and +1.5% speedometer effect.
| Metric | This size: 265/70 R17 | Alternative: 275/65 R18 | Difference | Verdict |
|---|---|---|---|---|
| Overall diameter | 31.61 in | 32.07 in | +1.5% | Within tolerance |
| Section width | 10.43 in | 10.83 in | +0.39 in | Computed difference |
| Sidewall height | 7.30 in | 7.04 in | -0.27 in | Computed difference |
| Circumference | 99.29 in | 100.77 in | +1.5% | Within tolerance |
| Speedo | 0.0% | +1.5% | +1.5% | Within tolerance |
Compare sizes
Looks valid
Looks valid
Units
✓ Within toleranceDiameter +1.5% (+0.47 in) · US (~3%)
- Within tolerance · Diameter +1.5%.
- Speedo @ 60: 60 mph → 60.9 mph.
- Sidewall -0.27 in · Width +0.39 in.
Diameter+1.5%+0.47 in
Speedo @ 60+1.5%60 mph → 60.9 mph
Sidewall-0.27 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 32.07 in+0.47 in
- Sidewall
- 7.30 in 7.04 in-0.27 in
- Width
- 10.43 in 10.83 in+0.39 in
- Circumference
- 99.29 in 100.77 in+1.5%
- Revs / mile
- 638 629
- Speedo @ 60
- 60 mph 60.9 mph+1.5%
- Current —
265/70 R17 - New —
275/65 R18 - Grounded to the road: the axle rises +0.23 in.
Result report
265/70 R17 275/65 R18 · Within tolerance
Use this size when shopping: 275/65 R18
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 · 275/65 R18 · Methodology
What changed
- Reviewed deterministic geometry, load/speed references, sitemap inclusion and localized page shell.