Comparison
235/60 R18 vs 245/70 R16
245/70 R16 drops the rim from 18 to 16 inches versus 235/60 R18, trading wheel size for taller sidewall. This sizing approach barely shifts the rolling circumference. More sidewall typically improves comfort and curb protection, especially on city streets.
Speedometer drift stays small enough that most drivers won't notice it day to day. Diameter change stays inside the conservative ±3% safety window — an OEM-safe fitment on most vehicles.
TakeTypical choice for a dedicated winter or off-road setup where extra sidewall pays off.
Quick math: 245/70 R16 is 10.2 mm taller than 235/60 R18, shifting the speedometer by +1.38%.
Current Tire
New Tire
Ground line · scaled comparison
Excellent Fit
Within ±3% — safe for daily driving
Diameter change
+10.2 mm
1.38%
Speedometer at 100
101.4 km/h
+1.38% error
Ground clearance
+5.1 mm
ride height delta
Sidewall change
+30.5 mm
revs/km: 424.8
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/compare/235-60-r18-vs-245-70-r16Detailed comparison
| Metric | 235/60 R18 | 245/70 R16 | Difference |
|---|---|---|---|
| Overall diameter | 739.2 mm | 749.4 mm | +10.2 mm (+1.38%) |
| Sidewall height | 141.0 mm | 171.5 mm | +30.5 mm |
| Circumference | 2.322 m | 2.354 m | +32.0 mm |
| Revs / km | 430.6 | 424.8 | -5.9 |
| Ground clearance | reference | +5.1 mm | +5.1 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 101.4 km/h | +1.38 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 101.4 km/h after switching to 245/70 R16 — a +1.38% 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 +5.1 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.
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235/60 R18
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245/70 R16
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