Comparison
235/65 R17 vs 265/60 R18
Plus-sizing from 235/65 R17 to 265/60 R18 keeps overall diameter close to factory while opening room for a larger 18-inch wheel. This wheel and tire pairing swings rolling diameter far enough to feel on the road.
Speedometer error is large enough that recalibration is effectively required for accurate readings. Expect a more planted steering feel, at the cost of some of the cushioning a taller sidewall provides. The wider section adds contact patch and lateral stability, while eating into fender and suspension clearance. The larger wheel shows more of the brake hardware and tightens up the wheel-gap look. A diameter change beyond 5% is aggressive enough to influence ABS, traction control and gearing; treat it as a serious modification.
TakeRecommended only after a professional fitment check and speedometer recalibration.
Quick math: 265/60 R18 is 37.9 mm taller than 235/65 R17, shifting the speedometer by +5.14%.
Current Tire
New Tire
Ground line · scaled comparison
Not Recommended
Over 5% — speedometer & ABS may misread
Diameter change
+37.9 mm
5.14%
Speedometer at 100
105.1 km/h
+5.14% error
Ground clearance
+19.0 mm
ride height delta
Sidewall change
+6.3 mm
revs/km: 410.6
Permalink for this comparison:
/compare/235-65-r17-vs-265-60-r18Detailed comparison
| Metric | 235/65 R17 | 265/60 R18 | Difference |
|---|---|---|---|
| Overall diameter | 737.3 mm | 775.2 mm | +37.9 mm (+5.14%) |
| Sidewall height | 152.8 mm | 159.0 mm | +6.3 mm |
| Circumference | 2.316 m | 2.435 m | +119.1 mm |
| Revs / km | 431.7 | 410.6 | -21.1 |
| Ground clearance | reference | +19.0 mm | +19.0 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 105.1 km/h | +5.14 km/h |
Verdict: danger
Over 5% diameter difference — likely to affect speedometer accuracy, ABS calibration and gearing. Not recommended without professional review.
Speedometer impact
At a true 100 km/h, your dashboard will read 105.1 km/h after switching to 265/60 R18 — a +5.14% 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 +19.0 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
235/65 R17
Back to
265/60 R18
Drivers also compare
Closely-related fitments and plus-size swaps for 235/65 R17 and 265/60 R18.
235/65 R17 vs 245/65 R17
Wider variation on the same rim — more grip, less clearance.
Δ 1.76%
225/65 R17 vs 235/65 R17
Wider variation on the same rim — more grip, less clearance.
Δ 1.79%
265/60 R18 vs 285/60 R18
Wider variation on the same rim — more grip, less clearance.
Δ 3.10%
245/60 R18 vs 265/60 R18
Wider variation on the same rim — more grip, less clearance.
Δ 3.19%
225/60 R17 vs 235/65 R17
Wider variation on the same rim — more grip, less clearance.
Δ 4.81%
255/55 R18 vs 265/60 R18
Wider variation on the same rim — more grip, less clearance.
Δ 4.84%
235/60 R18 vs 265/60 R18
Wider variation on the same rim — more grip, less clearance.
Δ 4.87%
235/65 R17 vs 255/50 R19
Plus-two upgrade — bigger wheel, much shorter sidewall.
Δ 0.04%
Related topics