265/65 R18 vs 265/70 R17
265/65 R18 vs 265/70 R17
265/70 R17 stays within the configured tolerance for 265/65 R18: +0.1% diameter and +0.1% speedometer effect.
Fitment verdict
265/70 R17 stays within the configured tolerance for 265/65 R18: +0.1% diameter and +0.1% speedometer effect.
| Metric | This size: 265/65 R18 | Alternative: 265/70 R17 | Difference | Verdict |
|---|---|---|---|---|
| Overall diameter | 31.56 in | 31.61 in | +0.1% | Within tolerance |
| Section width | 10.43 in | 10.43 in | 0.00 in | Computed difference |
| Sidewall height | 6.78 in | 7.30 in | +0.52 in | Computed difference |
| Circumference | 99.16 in | 99.29 in | +0.1% | Within tolerance |
| Speedo | 0.0% | +0.1% | +0.1% | Within tolerance |
Compare sizes
Looks valid
Looks valid
Units
✓ Within toleranceDiameter +0.1% (+0.04 in) · US (~3%)
- Within tolerance · Diameter +0.1%.
- Speedo @ 60: 60 mph → 60.1 mph.
- Sidewall +0.52 in · Width +0.00 in.
Diameter+0.1%+0.04 in
Speedo @ 60+0.1%60 mph → 60.1 mph
Sidewall+0.52 inWidth +0.00 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
- 31.56 in 31.61 in+0.04 in
- Sidewall
- 6.78 in 7.30 in+0.52 in
- Width
- 10.43 in 10.43 in+0.00 in
- Circumference
- 99.16 in 99.29 in+0.1%
- Revs / mile
- 639 638
- Speedo @ 60
- 60 mph 60.1 mph+0.1%
- Current —
265/65 R18 - New —
265/70 R17 - Grounded to the road: the axle rises +0.02 in.
Result report
265/65 R18 265/70 R17 · Within tolerance
Use this size when shopping: 265/70 R17
Geometric estimate. Always verify physical clearance (arches, suspension, brakes) before fitting.
Safe alternative sizes
| Size | Diameter | Speedo @ 100 | Use this |
|---|---|---|---|
−1″ 285/65R17 | +0.1% | +0.1% | |
OE 265/65R18 | +0.0% | +0.0% | |
+1″ 355/45R19 | +0.0% | +0.0% | |
+2″ 245/60R20 | +0.0% | +0.0% |
265/65 R18 · 265/70 R17 · Methodology
What changed
- Reviewed deterministic geometry, load/speed references, sitemap inclusion and localized page shell.