Comparison
155/70 R13 vs 175/70 R13
On the same 13-inch wheel, 175/70 R13 grows the section width by 20 mm versus 155/70 R13. This tire combination noticeably changes overall diameter compared to OEM.
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. A diameter change beyond 5% is aggressive enough to influence ABS, traction control and gearing; treat it as a serious modification.
TakeTreat as a serious modification — verify clearance, recalibrate the speedometer and reassess load capacity.
Quick math: 175/70 R13 is 28.0 mm taller than 155/70 R13, shifting the speedometer by +5.12%.
Current Tire
New Tire
Ground line · scaled comparison
Not Recommended
Over 5% — speedometer & ABS may misread
Diameter change
+28.0 mm
5.12%
Speedometer at 100
105.1 km/h
+5.12% error
Ground clearance
+14.0 mm
ride height delta
Sidewall change
+14.0 mm
revs/km: 553.4
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/compare/155-70-r13-vs-175-70-r13Detailed comparison
| Metric | 155/70 R13 | 175/70 R13 | Difference |
|---|---|---|---|
| Overall diameter | 547.2 mm | 575.2 mm | +28.0 mm (+5.12%) |
| Sidewall height | 108.5 mm | 122.5 mm | +14.0 mm |
| Circumference | 1.719 m | 1.807 m | +88.0 mm |
| Revs / km | 581.7 | 553.4 | -28.3 |
| Ground clearance | reference | +14.0 mm | +14.0 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 105.1 km/h | +5.12 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 175/70 R13 — a +5.12% 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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155/70 R13
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175/70 R13
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