Comparison
215/55 R17 vs 235/45 R17
Going from 215/55 R17 to 235/45 R17 keeps the rim but tightens the sidewall for a sportier look. This sizing approach noticeably changes overall diameter compared to OEM. The shorter sidewall gives the tire a firmer, more responsive feel and sharpens steering input.
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.
TakeSuits drivers who value sharper steering and appearance over outright ride softness.
Quick math: 235/45 R17 is 25.0 mm shorter than 215/55 R17, shifting the speedometer by -3.74%.
Current Tire
New Tire
Ground line · scaled comparison
Slight Difference
Within ±5% — usable, recalibration recommended
Diameter change
-25.0 mm
-3.74%
Speedometer at 100
96.3 km/h
-3.74% error
Ground clearance
-12.5 mm
ride height delta
Sidewall change
-12.5 mm
revs/km: 494.8
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/compare/215-55-r17-vs-235-45-r17Detailed comparison
| Metric | 215/55 R17 | 235/45 R17 | Difference |
|---|---|---|---|
| Overall diameter | 668.3 mm | 643.3 mm | -25.0 mm (-3.74%) |
| Sidewall height | 118.3 mm | 105.8 mm | -12.5 mm |
| Circumference | 2.100 m | 2.021 m | -78.5 mm |
| Revs / km | 476.3 | 494.8 | +18.5 |
| Ground clearance | reference | -12.5 mm | -12.5 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 96.3 km/h | -3.74 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 96.3 km/h after switching to 235/45 R17 — a -3.74% 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 -12.5 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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215/55 R17
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235/45 R17
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