Comparison
225/60 R16 vs 255/45 R18
Plus-sizing from 225/60 R16 to 255/45 R18 keeps overall diameter close to factory while opening room for a larger 18-inch wheel. This alternative fitment shifts overall diameter slightly from OEM.
Expect a slight but noticeable shift in indicated speed compared to the original tires. Expect a more planted steering feel, at the cost of some of the cushioning a taller sidewall provides. Extra width broadens the footprint for more grip, but check inner liner and strut clearance before fitting. Many drivers pick this direction primarily for appearance — the bigger rim simply looks more aggressive. Overall the swap sits inside the safe ±3% diameter window, so ABS, traction control and gearing behave normally.
TakeCommon upgrade for sportier handling and a tighter wheel-gap look on the same vehicle.
Quick math: 255/45 R18 is 10.3 mm taller than 225/60 R16, shifting the speedometer by +1.52%.
Current Tire
New Tire
Ground line · scaled comparison
Excellent Fit
Within ±3% — safe for daily driving
Diameter change
+10.3 mm
1.52%
Speedometer at 100
101.5 km/h
+1.52% error
Ground clearance
+5.2 mm
ride height delta
Sidewall change
-20.3 mm
revs/km: 463.5
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/compare/225-60-r16-vs-255-45-r18Detailed comparison
| Metric | 225/60 R16 | 255/45 R18 | Difference |
|---|---|---|---|
| Overall diameter | 676.4 mm | 686.7 mm | +10.3 mm (+1.52%) |
| Sidewall height | 135.0 mm | 114.8 mm | -20.3 mm |
| Circumference | 2.125 m | 2.157 m | +32.4 mm |
| Revs / km | 470.6 | 463.5 | -7.1 |
| Ground clearance | reference | +5.2 mm | +5.2 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 101.5 km/h | +1.52 km/h |
Verdict: excellent
Within ±3% — speedometer, ABS and traction control should behave normally.
Speedometer impact
At a true 100 km/h, your dashboard will read 101.5 km/h after switching to 255/45 R18 — a +1.52% 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 +5.2 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.
Back to
225/60 R16
Back to
255/45 R18
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