275/55 R20 vs 37x13.50 R20
275/55 R20 vs 37x13.50 R20
37x13.50 R20 is outside the configured tolerance for 275/55 R20: +16.0% diameter and +16.0% speedometer effect.
Fitment verdict
37x13.50 R20 is outside the configured tolerance for 275/55 R20: +16.0% diameter and +16.0% speedometer effect.
| Metric | This size: 275/55 R20 | Alternative: 37x13.50 R20 | Difference | Verdict |
|---|---|---|---|---|
| Overall diameter | 31.91 in | 37.00 in | +16.0% | Too tall |
| Section width | 10.83 in | 13.50 in | +2.67 in | Computed difference |
| Sidewall height | 5.95 in | 8.50 in | +2.55 in | Computed difference |
| Circumference | 100.25 in | 116.24 in | +16.0% | Too tall |
| Speedo | 0.0% | +16.0% | +16.0% | Outside tolerance |
Compare sizes
Looks valid
Looks valid
Units
✕ Out of toleranceDiameter +16.0% (+5.09 in) · US (~3%)
- Out of tolerance · Diameter +16.0%.
- Speedo @ 60: 60 mph → 69.6 mph.
- Sidewall +2.55 in · Width +2.67 in.
Diameter+16.0%+5.09 in
Speedo @ 60+16.0%60 mph → 69.6 mph
Sidewall+2.55 inWidth +2.67 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
- 31.91 in 37.00 in+5.09 in
- Sidewall
- 5.95 in 8.50 in+2.55 in
- Width
- 10.83 in 13.50 in+2.67 in
- Circumference
- 100.25 in 116.24 in+16.0%
- Revs / mile
- 632 545
- Speedo @ 60
- 60 mph 69.6 mph+16.0%
- Current —
275/55 R20 - New —
37x13.50 R20 - Grounded to the road: the axle rises +2.55 in.
Result report
275/55 R20 37x13.50 R20 · Out of tolerance
Use this size when shopping: 37x13.50 R20
Geometric estimate. Always verify physical clearance (arches, suspension, brakes) before fitting.
Safe alternative sizes
| Size | Diameter | Speedo @ 100 | Use this |
|---|---|---|---|
−1″ 205/80R19 | +0.0% | +0.0% | |
OE 275/55R20 | +0.0% | +0.0% | |
+1″ 185/75R21 | +0.0% | +0.0% | |
+2″ 315/40R22 | +0.0% | +0.0% |
275/55 R20 · 37x13.50 R20 · Methodology
What changed
- Reviewed deterministic geometry, load/speed references, sitemap inclusion and localized page shell.