33x12.50 R15 vs 33x12.50 R18
33x12.50 R15 vs 33x12.50 R18
33x12.50 R18 stays within the configured tolerance for 33x12.50 R15: 0.0% diameter and 0.0% speedometer effect.
Fitment verdict
33x12.50 R18 stays within the configured tolerance for 33x12.50 R15: 0.0% diameter and 0.0% speedometer effect.
| Metric | This size: 33x12.50 R15 | Alternative: 33x12.50 R18 | Difference | Verdict |
|---|---|---|---|---|
| Overall diameter | 33.00 in | 33.00 in | 0.0% | Within tolerance |
| Section width | 12.50 in | 12.50 in | 0.00 in | Computed difference |
| Sidewall height | 9.00 in | 7.50 in | -1.50 in | Computed difference |
| Circumference | 103.67 in | 103.67 in | 0.0% | Within tolerance |
| Speedo | 0.0% | 0.0% | 0.0% | Within tolerance |
Compare sizes
Looks valid
Looks valid
Units
✓ Within toleranceDiameter +0.0% (+0.00 in) · US (~3%)
- Within tolerance · Diameter +0.0%.
- Speedo @ 60: 60 mph → 60.0 mph.
- Sidewall -1.50 in · Width +0.00 in.
Diameter+0.0%+0.00 in
Speedo @ 60+0.0%60 mph → 60.0 mph
Sidewall-1.50 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
- 33.00 in 33.00 in+0.00 in
- Sidewall
- 9.00 in 7.50 in-1.50 in
- Width
- 12.50 in 12.50 in+0.00 in
- Circumference
- 103.67 in 103.67 in+0.0%
- Revs / mile
- 611 611
- Speedo @ 60
- 60 mph 60.0 mph+0.0%
- Current —
33x12.50 R15 - New —
33x12.50 R18 - Grounded to the road: the axle rises +0.00 in.
Result report
33x12.50 R15 33x12.50 R18 · Within tolerance
Use this size when shopping: 33x12.50 R18
Geometric estimate. Always verify physical clearance (arches, suspension, brakes) before fitting.
Safe alternative sizes
| Size | Diameter | Speedo @ 100 | Use this |
|---|---|---|---|
−1″ 345/70R14 | +0.0% | +0.0% | |
OE 305/75R15 | +0.0% | +0.0% | |
+1″ 335/65R16 | +0.4% | +0.4% | |
+2″ 255/80R17 | +0.2% | +0.2% |
33x12.50 R15 · 33x12.50 R18 · Methodology
What changed
- Reviewed deterministic geometry, load/speed references, sitemap inclusion and localized page shell.