Comparison
225/60 R16 vs 275/35 R18
Going from 225/60 R16 to 275/35 R18 steps up to a 18-inch rim while trimming sidewall to stay near OEM rolling diameter. This sizing approach noticeably changes overall diameter compared to OEM. The shorter sidewall gives the tire a firmer, more responsive feel and sharpens steering input.
The speedometer error is noticeable and may warrant a recalibration if you rely on indicated speed. The 3–5% diameter gap puts this in caution territory: doable on many cars, but verify clearance and consider recalibration.
TakeA solid pick for drivers chasing a more aggressive stance without abandoning OEM rolling diameter.
Quick math: 275/35 R18 is 26.7 mm shorter than 225/60 R16, shifting the speedometer by -3.95%.
Current Tire
New Tire
Ground line · scaled comparison
Slight Difference
Within ±5% — usable, recalibration recommended
Diameter change
-26.7 mm
-3.95%
Speedometer at 100
96.1 km/h
-3.95% error
Ground clearance
-13.3 mm
ride height delta
Sidewall change
-38.8 mm
revs/km: 489.9
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/compare/225-60-r16-vs-275-35-r18Detailed comparison
| Metric | 225/60 R16 | 275/35 R18 | Difference |
|---|---|---|---|
| Overall diameter | 676.4 mm | 649.7 mm | -26.7 mm (-3.95%) |
| Sidewall height | 135.0 mm | 96.3 mm | -38.8 mm |
| Circumference | 2.125 m | 2.041 m | -83.9 mm |
| Revs / km | 470.6 | 489.9 | +19.3 |
| Ground clearance | reference | -13.3 mm | -13.3 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 96.1 km/h | -3.95 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 96.1 km/h after switching to 275/35 R18 — a -3.95% 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 -13.3 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
275/35 R18
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