Comparison
235/60 R18 vs 245/65 R17
245/65 R17 drops the rim from 18 to 17 inches versus 235/60 R18, trading wheel size for taller sidewall. This sizing approach moves rolling diameter a touch off the original spec. More sidewall typically improves comfort and curb protection, especially on city streets.
Expect a slight but noticeable shift in indicated speed compared to the original tires. Overall the swap sits inside the safe ±3% diameter window, so ABS, traction control and gearing behave normally.
TakePractical direction for winter wheels, chains, or rougher pavement where cushioning matters.
Quick math: 245/65 R17 is 11.1 mm taller than 235/60 R18, shifting the speedometer by +1.50%.
Current Tire
New Tire
Ground line · scaled comparison
Excellent Fit
Within ±3% — safe for daily driving
Diameter change
+11.1 mm
1.50%
Speedometer at 100
101.5 km/h
+1.50% error
Ground clearance
+5.5 mm
ride height delta
Sidewall change
+18.3 mm
revs/km: 424.2
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/compare/235-60-r18-vs-245-65-r17Detailed comparison
| Metric | 235/60 R18 | 245/65 R17 | Difference |
|---|---|---|---|
| Overall diameter | 739.2 mm | 750.3 mm | +11.1 mm (+1.50%) |
| Sidewall height | 141.0 mm | 159.3 mm | +18.3 mm |
| Circumference | 2.322 m | 2.357 m | +34.9 mm |
| Revs / km | 430.6 | 424.2 | -6.4 |
| Ground clearance | reference | +5.5 mm | +5.5 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 101.5 km/h | +1.50 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 101.5 km/h after switching to 245/65 R17 — a +1.50% 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 +5.5 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.
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235/60 R18
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245/65 R17
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