Comparison
215/60 R17 vs 225/55 R18
Plus-sizing from 215/60 R17 to 225/55 R18 keeps overall diameter close to factory while opening room for a larger 18-inch wheel. This wheel and tire pairing shifts overall diameter slightly from OEM.
The speedometer offset is small but measurable; worth keeping in mind if you watch the dash closely. 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: 225/55 R18 is 14.9 mm taller than 215/60 R17, shifting the speedometer by +2.16%.
Current Tire
New Tire
Ground line · scaled comparison
Excellent Fit
Within ±3% — safe for daily driving
Diameter change
+14.9 mm
2.16%
Speedometer at 100
102.2 km/h
+2.16% error
Ground clearance
+7.5 mm
ride height delta
Sidewall change
-5.3 mm
revs/km: 451.7
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/compare/215-60-r17-vs-225-55-r18Detailed comparison
| Metric | 215/60 R17 | 225/55 R18 | Difference |
|---|---|---|---|
| Overall diameter | 689.8 mm | 704.7 mm | +14.9 mm (+2.16%) |
| Sidewall height | 129.0 mm | 123.8 mm | -5.3 mm |
| Circumference | 2.167 m | 2.214 m | +46.8 mm |
| Revs / km | 461.5 | 451.7 | -9.8 |
| Ground clearance | reference | +7.5 mm | +7.5 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 102.2 km/h | +2.16 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 102.2 km/h after switching to 225/55 R18 — a +2.16% 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 +7.5 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
215/60 R17
Back to
225/55 R18
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215/60 R17 vs 225/60 R17
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