Comparison
145/70 R13 vs 165/70 R13
165/70 R13 is a wider variation of 145/70 R13 on the same 13-inch rim, adding 20 mm of tread footprint. This alternative fitment moves rolling diameter well outside the usual OEM tolerance.
The dashboard speed will be significantly off — plan on recalibration before daily use. Extra width broadens the footprint for more grip, but check inner liner and strut clearance before fitting. The diameter gap exceeds 5%, which can affect speedometer accuracy, ABS calibration and final gearing — review with a professional first.
TakeRecommended only after a professional fitment check and speedometer recalibration.
Quick math: 165/70 R13 is 28.0 mm taller than 145/70 R13, shifting the speedometer by +5.25%.
Current Tire
New Tire
Ground line · scaled comparison
Not Recommended
Over 5% — speedometer & ABS may misread
Diameter change
+28.0 mm
5.25%
Speedometer at 100
105.3 km/h
+5.25% error
Ground clearance
+14.0 mm
ride height delta
Sidewall change
+14.0 mm
revs/km: 567.2
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/compare/145-70-r13-vs-165-70-r13Detailed comparison
| Metric | 145/70 R13 | 165/70 R13 | Difference |
|---|---|---|---|
| Overall diameter | 533.2 mm | 561.2 mm | +28.0 mm (+5.25%) |
| Sidewall height | 101.5 mm | 115.5 mm | +14.0 mm |
| Circumference | 1.675 m | 1.763 m | +88.0 mm |
| Revs / km | 597.0 | 567.2 | -29.8 |
| Ground clearance | reference | +14.0 mm | +14.0 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 105.3 km/h | +5.25 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 105.3 km/h after switching to 165/70 R13 — a +5.25% 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 +14.0 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.
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145/70 R13
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165/70 R13
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