Comparison
205/55 R16 vs 225/55 R16
Stepping from 205/55 R16 to 225/55 R16 keeps the 16-inch wheel but widens the section by 20 mm. This alternative fitment moves rolling diameter well outside the usual OEM tolerance.
Indicated speed will drift far enough that recalibration is worth considering. Extra width broadens the footprint for more grip, but check inner liner and strut clearance before fitting. The 3–5% diameter gap puts this in caution territory: doable on many cars, but verify clearance and consider recalibration.
TakeReasonable performance-leaning swap as long as fender and suspension clearance check out.
Quick math: 225/55 R16 is 22.0 mm taller than 205/55 R16, shifting the speedometer by +3.48%.
Current Tire
New Tire
Ground line · scaled comparison
Slight Difference
Within ±5% — usable, recalibration recommended
Diameter change
+22.0 mm
3.48%
Speedometer at 100
103.5 km/h
+3.48% error
Ground clearance
+11.0 mm
ride height delta
Sidewall change
+11.0 mm
revs/km: 486.8
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/compare/205-55-r16-vs-225-55-r16Detailed comparison
| Metric | 205/55 R16 | 225/55 R16 | Difference |
|---|---|---|---|
| Overall diameter | 631.9 mm | 653.9 mm | +22.0 mm (+3.48%) |
| Sidewall height | 112.8 mm | 123.8 mm | +11.0 mm |
| Circumference | 1.985 m | 2.054 m | +69.1 mm |
| Revs / km | 503.7 | 486.8 | -16.9 |
| Ground clearance | reference | +11.0 mm | +11.0 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 103.5 km/h | +3.48 km/h |
Verdict: warning
Between 3% and 5% — noticeable speedometer drift; recalibration may be advisable.
Speedometer impact
At a true 100 km/h, your dashboard will read 103.5 km/h after switching to 225/55 R16 — a +3.48% offset. Use the speedometer error calculator to recheck for other indicated speeds, and the speedometer error guide for the full background.
Ground clearance change
The new tire's half-diameter changes ride height by +11.0 mm. Small differences are absorbed by suspension travel, but anything beyond ±10 mm can affect headlight aim, fender clearance and bump-stop margin. See the plus-sizing guide before committing.
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205/55 R16
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225/55 R16
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