205/55 R17
What size is 205/55 R17?
205/55 R17 has an overall diameter of about 25.88 in, a section width of 8.07 in and a sidewall height of 4.44 in. It turns roughly 779 times per mile. Below are the exact figures plus in-tolerance plus/minus sizes you can switch to safely.
- Overall diameter: 25.88 in.
- Section width: 8.07 in.
- Sidewall height: 4.44 in.
- Revolutions: 484 /km · 779 /mi.
- In-tolerance sizes: 225/50 R17 (-0.1%).
Fitment verdict
225/50 R17 stays within the configured tolerance for 205/55 R17: -0.1% diameter and -0.1% speedometer effect.
| Metric | This size: 205/55 R17 | Alternative: 225/50 R17 | Difference | Verdict |
|---|---|---|---|---|
| Overall diameter | 25.88 in | 25.86 in | -0.1% | Within tolerance |
| Section width | 8.07 in | 8.86 in | +0.79 in | Computed difference |
| Sidewall height | 4.44 in | 4.43 in | -0.01 in | Computed difference |
| Circumference | 81.30 in | 81.24 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 | 25.88 in |
|---|---|
| Section width | 8.07 in |
| Sidewall height | 4.44 in |
| Circumference | 81.30 in |
| Revolutions | 484 /km · 779 /mi |
In-tolerance sizes
Alternative sizes that stay within the safe diameter tolerance:
| Size | Diameter | Speedo | Verdict |
|---|---|---|---|
| 225/50 R17 | -0.1% | -0.1% | ✓ OK |
| 225/45 R18 | +0.4% | +0.4% | ✓ OK |
| 245/35 R19 | -0.5% | -0.5% | ✓ OK |
| 225/55 R16 | -0.5% | -0.5% | ✓ OK |
| 255/35 R19 | +0.6% | +0.6% | ✓ OK |
| 245/40 R18 | -0.6% | -0.6% | ✓ OK |
| 205/60 R16 | -0.7% | -0.7% | ✓ OK |
| 245/45 R17 | -0.8% | -0.8% | ✓ OK |
| 215/60 R16 | +1.1% | +1.1% | ✓ OK |
| 205/65 R15 | -1.5% | -1.5% | ✓ OK |
| 235/35 R19 | -1.6% | -1.6% | ✓ OK |
| 215/50 R17 | -1.6% | -1.6% | ✓ OK |
Compare sizes
- Within tolerance · Diameter -0.1%.
- Speedo @ 60: 60 mph → 60.0 mph.
- Sidewall -0.01 in · Width +0.79 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
- 25.88 in 25.86 in-0.02 in
- Sidewall
- 4.44 in 4.43 in-0.01 in
- Width
- 8.07 in 8.86 in+0.79 in
- Circumference
- 81.30 in 81.24 in-0.1%
- Revs / mile
- 779 780
- Speedo @ 60
- 60 mph 60.0 mph-0.1%
- Current —
205/55 R17 - New —
225/50 R17 - Grounded to the road: the axle rises -0.01 in.
Result report
205/55 R17 225/50 R17 · Within tolerance
Use this size when shopping: 225/50 R17
Geometric estimate. Always verify physical clearance (arches, suspension, brakes) before fitting.
Safe alternative sizes
| Size | Diameter | Speedo @ 100 | Use this |
|---|---|---|---|
−1″ 315/40R16 | +0.2% | +0.2% | |
OE 205/55R17 | +0.0% | +0.0% | |
+1″ 125/80R18 | -0.0% | -0.0% | |
+2″ 125/70R19 | +0.0% | +0.0% |
More tools
- How to read a tire size
- Plus sizing guide
- Speedometer error guide
- 205mm Section width guide
- /55 Aspect ratio guide
- Rim diameter 17"
- 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.