195/55 R15
What size is 195/55 R15?
195/55 R15 has an overall diameter of about 23.44 in, a section width of 7.68 in and a sidewall height of 4.22 in. It turns roughly 860 times per mile. Below are the exact figures plus in-tolerance plus/minus sizes you can switch to safely.
- Overall diameter: 23.44 in.
- Section width: 7.68 in.
- Sidewall height: 4.22 in.
- Revolutions: 535 /km · 860 /mi.
- In-tolerance sizes: 185/65 R14 (+0.1%).
Fitment verdict
185/65 R14 stays within the configured tolerance for 195/55 R15: +0.1% diameter and +0.1% speedometer effect.
| Metric | This size: 195/55 R15 | Alternative: 185/65 R14 | Difference | Verdict |
|---|---|---|---|---|
| Overall diameter | 23.44 in | 23.47 in | +0.1% | Within tolerance |
| Section width | 7.68 in | 7.28 in | -0.39 in | Computed difference |
| Sidewall height | 4.22 in | 4.73 in | +0.51 in | Computed difference |
| Circumference | 73.65 in | 73.73 in | +0.1% | Within tolerance |
| Speedo | 0.0% | +0.1% | +0.1% | 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 | 23.44 in |
|---|---|
| Section width | 7.68 in |
| Sidewall height | 4.22 in |
| Circumference | 73.65 in |
| Revolutions | 535 /km · 860 /mi |
In-tolerance sizes
Alternative sizes that stay within the safe diameter tolerance:
| Size | Diameter | Speedo | Verdict |
|---|---|---|---|
| 185/65 R14 | +0.1% | +0.1% | ✓ OK |
| 165/70 R14 | -1.5% | -1.5% | ✓ OK |
| 185/55 R15 | -1.8% | -1.8% | ✓ OK |
| 175/65 R14 | -2.1% | -2.1% | ✓ OK |
| 175/65 R15 | +2.2% | +2.2% | ✓ OK |
| 205/50 R16 | +2.7% | +2.7% | ✓ OK |
Compare sizes
- Within tolerance · Diameter +0.1%.
- Speedo @ 60: 60 mph → 60.1 mph.
- Sidewall +0.51 in · Width -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
- 23.44 in 23.47 in+0.02 in
- Sidewall
- 4.22 in 4.73 in+0.51 in
- Width
- 7.68 in 7.28 in-0.39 in
- Circumference
- 73.65 in 73.73 in+0.1%
- Revs / mile
- 860 859
- Speedo @ 60
- 60 mph 60.1 mph+0.1%
- Current —
195/55 R15 - New —
185/65 R14 - Grounded to the road: the axle rises +0.01 in.
Result report
195/55 R15 185/65 R14 · Within tolerance
Use this size when shopping: 185/65 R14
Geometric estimate. Always verify physical clearance (arches, suspension, brakes) before fitting.
Safe alternative sizes
| Size | Diameter | Speedo @ 100 | Use this |
|---|---|---|---|
−1″ 185/65R14 | +0.1% | +0.1% | |
OE 195/55R15 | +0.0% | +0.0% | |
+1″ 135/70R16 | -0.0% | -0.0% | |
+2″ 205/40R17 | +0.1% | +0.1% |
More tools
- How to read a tire size
- Plus sizing guide
- Speedometer error guide
- 195mm Section width guide
- /55 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.