Comparison
155/80 R13 vs 185/65 R14
Plus-sizing from 155/80 R13 to 185/65 R14 keeps overall diameter close to factory while opening room for a larger 14-inch wheel. This sizing approach moves rolling diameter well outside the usual OEM tolerance. Expect a more planted steering feel, at the cost of some of the cushioning a taller sidewall provides.
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: 185/65 R14 is 17.9 mm taller than 155/80 R13, shifting the speedometer by +3.10%.
Current Tire
New Tire
Ground line · scaled comparison
Slight Difference
Within ±5% — usable, recalibration recommended
Diameter change
+17.9 mm
3.10%
Speedometer at 100
103.1 km/h
+3.10% error
Ground clearance
+8.9 mm
ride height delta
Sidewall change
-3.8 mm
revs/km: 534.0
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/compare/155-80-r13-vs-185-65-r14Detailed comparison
| Metric | 155/80 R13 | 185/65 R14 | Difference |
|---|---|---|---|
| Overall diameter | 578.2 mm | 596.1 mm | +17.9 mm (+3.10%) |
| Sidewall height | 124.0 mm | 120.3 mm | -3.8 mm |
| Circumference | 1.816 m | 1.873 m | +56.2 mm |
| Revs / km | 550.5 | 534.0 | -16.5 |
| Ground clearance | reference | +8.9 mm | +8.9 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 103.1 km/h | +3.10 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 103.1 km/h after switching to 185/65 R14 — a +3.10% 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 +8.9 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
155/80 R13
Back to
185/65 R14
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