Comparison
215/55 R17 vs 245/45 R17
245/45 R17 is a lower-profile take on 215/55 R17 — same 17-inch wheel, shorter sidewall. This tire combination trims or stretches rolling diameter by a small margin. Expect a slight but noticeable shift in indicated speed compared to the original tires. The shorter sidewall gives the tire a firmer, more responsive feel and sharpens steering input. Diameter change stays inside the conservative ±3% safety window — an OEM-safe fitment on most vehicles.
TakeSuits drivers who value sharper steering and appearance over outright ride softness.
Quick math: 245/45 R17 is 16.0 mm shorter than 215/55 R17, shifting the speedometer by -2.39%.
Current Tire
New Tire
Ground line · scaled comparison
Excellent Fit
Within ±3% — safe for daily driving
Diameter change
-16.0 mm
-2.39%
Speedometer at 100
97.6 km/h
-2.39% error
Ground clearance
-8.0 mm
ride height delta
Sidewall change
-8.0 mm
revs/km: 488.0
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/compare/215-55-r17-vs-245-45-r17Detailed comparison
| Metric | 215/55 R17 | 245/45 R17 | Difference |
|---|---|---|---|
| Overall diameter | 668.3 mm | 652.3 mm | -16.0 mm (-2.39%) |
| Sidewall height | 118.3 mm | 110.3 mm | -8.0 mm |
| Circumference | 2.100 m | 2.049 m | -50.3 mm |
| Revs / km | 476.3 | 488.0 | +11.7 |
| Ground clearance | reference | -8.0 mm | -8.0 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 97.6 km/h | -2.39 km/h |
Verdict: excellent
Within ±3% — speedometer, ABS and traction control should behave normally.
Speedometer impact
At a true 100 km/h, your dashboard will read 97.6 km/h after switching to 245/45 R17 — a -2.39% 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 -8.0 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.
Back to
215/55 R17
Back to
245/45 R17
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