Comparison
195/60 R16 vs 225/45 R18
225/45 R18 is a plus-2 alternative to 195/60 R16 — the bigger wheel shows through a thinner sidewall. This alternative fitment noticeably changes overall diameter compared to OEM. Less sidewall flex usually translates to crisper turn-in and a slightly stiffer ride over rough pavement.
Indicated speed will drift far enough that recalibration is worth considering. The 3–5% diameter gap puts this in caution territory: doable on many cars, but verify clearance and consider recalibration.
TakeCommon upgrade for sportier handling and a tighter wheel-gap look on the same vehicle.
Quick math: 225/45 R18 is 19.3 mm taller than 195/60 R16, shifting the speedometer by +3.01%.
Current Tire
New Tire
Ground line · scaled comparison
Slight Difference
Within ±5% — usable, recalibration recommended
Diameter change
+19.3 mm
3.01%
Speedometer at 100
103.0 km/h
+3.01% error
Ground clearance
+9.7 mm
ride height delta
Sidewall change
-15.8 mm
revs/km: 482.5
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/compare/195-60-r16-vs-225-45-r18Detailed comparison
| Metric | 195/60 R16 | 225/45 R18 | Difference |
|---|---|---|---|
| Overall diameter | 640.4 mm | 659.7 mm | +19.3 mm (+3.01%) |
| Sidewall height | 117.0 mm | 101.3 mm | -15.8 mm |
| Circumference | 2.012 m | 2.073 m | +60.6 mm |
| Revs / km | 497.0 | 482.5 | -14.5 |
| Ground clearance | reference | +9.7 mm | +9.7 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 103.0 km/h | +3.01 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 103.0 km/h after switching to 225/45 R18 — a +3.01% 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 +9.7 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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195/60 R16
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225/45 R18
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