Comparison
215/60 R16 vs 225/50 R18
Going from 215/60 R16 to 225/50 R18 steps up to a 18-inch rim while trimming sidewall to stay near OEM rolling diameter. This alternative fitment moves rolling diameter a touch off the original spec. The speedometer offset is small but measurable; worth keeping in mind if you watch the dash closely. Less sidewall flex usually translates to crisper turn-in and a slightly stiffer ride over rough pavement. Diameter change stays inside the conservative ±3% safety window — an OEM-safe fitment on most vehicles.
TakeCommon upgrade for sportier handling and a tighter wheel-gap look on the same vehicle.
Quick math: 225/50 R18 is 17.8 mm taller than 215/60 R16, shifting the speedometer by +2.68%.
Current Tire
New Tire
Ground line · scaled comparison
Excellent Fit
Within ±3% — safe for daily driving
Diameter change
+17.8 mm
2.68%
Speedometer at 100
102.7 km/h
+2.68% error
Ground clearance
+8.9 mm
ride height delta
Sidewall change
-16.5 mm
revs/km: 466.6
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/compare/215-60-r16-vs-225-50-r18Detailed comparison
| Metric | 215/60 R16 | 225/50 R18 | Difference |
|---|---|---|---|
| Overall diameter | 664.4 mm | 682.2 mm | +17.8 mm (+2.68%) |
| Sidewall height | 129.0 mm | 112.5 mm | -16.5 mm |
| Circumference | 2.087 m | 2.143 m | +55.9 mm |
| Revs / km | 479.1 | 466.6 | -12.5 |
| Ground clearance | reference | +8.9 mm | +8.9 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 102.7 km/h | +2.68 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 102.7 km/h after switching to 225/50 R18 — a +2.68% 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 +8.9 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 R16
Back to
225/50 R18
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