Comparison
225/50 R17 vs 225/55 R17
Switching from 225/50 R17 to 225/55 R17 keeps the wheel but adds sidewall for extra cushioning. This setup noticeably changes overall diameter compared to OEM. The taller sidewall adds cushioning over potholes and rougher roads, with a softer overall ride.
Indicated speed will drift far enough that recalibration is worth considering. Diameter delta falls in the cautious 3–5% range, where speedometer recalibration and a careful clearance check are worth doing.
TakeA comfort-leaning direction that's easier on wheels and suspension over rough surfaces.
Quick math: 225/55 R17 is 22.5 mm taller than 225/50 R17, shifting the speedometer by +3.43%.
Current Tire
New Tire
Ground line · scaled comparison
Slight Difference
Within ±5% — usable, recalibration recommended
Diameter change
+22.5 mm
3.43%
Speedometer at 100
103.4 km/h
+3.43% error
Ground clearance
+11.3 mm
ride height delta
Sidewall change
+11.3 mm
revs/km: 468.6
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/compare/225-50-r17-vs-225-55-r17Detailed comparison
| Metric | 225/50 R17 | 225/55 R17 | Difference |
|---|---|---|---|
| Overall diameter | 656.8 mm | 679.3 mm | +22.5 mm (+3.43%) |
| Sidewall height | 112.5 mm | 123.8 mm | +11.3 mm |
| Circumference | 2.063 m | 2.134 m | +70.7 mm |
| Revs / km | 484.6 | 468.6 | -16.1 |
| Ground clearance | reference | +11.3 mm | +11.3 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 103.4 km/h | +3.43 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 103.4 km/h after switching to 225/55 R17 — a +3.43% 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 +11.3 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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225/50 R17
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225/55 R17
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