Comparison
245/70 R16 vs 265/60 R18
Switching from 245/70 R16 to 265/60 R18 is a plus-2 upgrade that wraps a shorter sidewall around a larger 18-inch wheel. This setup swings rolling diameter far enough to feel on the road.
The speedometer error is noticeable and may warrant a recalibration if you rely on indicated speed. 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. Visually, the bigger wheel fills the arch and gives the car a more aggressive stance. Diameter delta falls in the cautious 3–5% range, where speedometer recalibration and a careful clearance check are worth doing.
TakeCommon upgrade for sportier handling and a tighter wheel-gap look on the same vehicle.
Quick math: 265/60 R18 is 25.8 mm taller than 245/70 R16, shifting the speedometer by +3.44%.
Current Tire
New Tire
Ground line · scaled comparison
Slight Difference
Within ±5% — usable, recalibration recommended
Diameter change
+25.8 mm
3.44%
Speedometer at 100
103.4 km/h
+3.44% error
Ground clearance
+12.9 mm
ride height delta
Sidewall change
-12.5 mm
revs/km: 410.6
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/compare/245-70-r16-vs-265-60-r18Detailed comparison
| Metric | 245/70 R16 | 265/60 R18 | Difference |
|---|---|---|---|
| Overall diameter | 749.4 mm | 775.2 mm | +25.8 mm (+3.44%) |
| Sidewall height | 171.5 mm | 159.0 mm | -12.5 mm |
| Circumference | 2.354 m | 2.435 m | +81.1 mm |
| Revs / km | 424.8 | 410.6 | -14.1 |
| Ground clearance | reference | +12.9 mm | +12.9 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 103.4 km/h | +3.44 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 103.4 km/h after switching to 265/60 R18 — a +3.44% 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 +12.9 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
245/70 R16
Back to
265/60 R18
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