33x12.50 R15
What size is 33x12.50 R15?
33x12.50 R15 has an overall diameter of about 33.00 in, a section width of 12.50 in and a sidewall height of 9.00 in. It turns roughly 611 times per mile. Below are the exact figures plus in-tolerance plus/minus sizes you can switch to safely.
- Overall diameter: 33.00 in.
- Section width: 12.50 in.
- Sidewall height: 9.00 in.
- Revolutions: 380 /km · 611 /mi.
- In-tolerance sizes: 33x12.50 R16 (+0.0%).
Fitment verdict
33x12.50 R16 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 R16 | 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 | 8.50 in | -0.50 in | Computed difference |
| Circumference | 103.67 in | 103.67 in | 0.0% | Within tolerance |
| Speedo | 0.0% | 0.0% | 0.0% | Within tolerance |
Seasonal check
Planning a long summer drive?
Use the budget and running-cost tools before a trip, especially if the current tyres are worn or the replacement size changes diameter.
Specification
| Overall diameter | 33.00 in |
|---|---|
| Section width | 12.50 in |
| Sidewall height | 9.00 in |
| Circumference | 103.67 in |
| Revolutions | 380 /km · 611 /mi |
In-tolerance sizes
Alternative sizes that stay within the safe diameter tolerance:
| Size | Diameter | Speedo | Verdict |
|---|---|---|---|
| 33x12.50 R16 | +0.0% | +0.0% | ✓ OK |
| 33x12.50 R18 | +0.0% | +0.0% | ✓ OK |
| 275/70 R18 | +0.5% | +0.5% | ✓ OK |
| 305/45 R22 | -0.6% | -0.6% | ✓ OK |
| 285/65 R18 | -1.3% | -1.3% | ✓ OK |
| 285/45 R22 | -2.7% | -2.7% | ✓ OK |
| 275/65 R18 | -2.8% | -2.8% | ✓ OK |
Compare sizes
- Within tolerance · Diameter +0.0%.
- Speedo @ 60: 60 mph → 60.0 mph.
- Sidewall -0.50 in · Width +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 8.50 in-0.50 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 R16 - Grounded to the road: the axle rises +0.00 in.
Result report
33x12.50 R15 33x12.50 R16 · Within tolerance
Use this size when shopping: 33x12.50 R16
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% |
More tools
- How to read a tire size
- Plus sizing guide
- Speedometer error guide
- Section width guide
- Aspect ratio guide
- Rim diameter 15"
- Load index chart
- Speed rating chart
- Rim width and tyre fitment guide
- Wheel offset guide
- Wheel spacers guide
- Tyre pressure for heavy loads and towing
What changed
- Reviewed deterministic geometry, load/speed references, sitemap inclusion and localized page shell.