Comparison
245/45 R20 vs 285/35 R20
285/35 R20 is a lower-profile take on 245/45 R20 — same 20-inch wheel, shorter sidewall. This tire combination shifts overall diameter slightly from OEM. The shorter sidewall gives the tire a firmer, more responsive feel and sharpens steering input.
Expect a slight but noticeable shift in indicated speed compared to the original tires. Overall the swap sits inside the safe ±3% diameter window, so ABS, traction control and gearing behave normally.
TakeSuits drivers who value sharper steering and appearance over outright ride softness.
Quick math: 285/35 R20 is 21.0 mm shorter than 245/45 R20, shifting the speedometer by -2.88%.
Current Tire
New Tire
Ground line · scaled comparison
Excellent Fit
Within ±3% — safe for daily driving
Diameter change
-21.0 mm
-2.88%
Speedometer at 100
97.1 km/h
-2.88% error
Ground clearance
-10.5 mm
ride height delta
Sidewall change
-10.5 mm
revs/km: 449.9
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/compare/245-45-r20-vs-285-35-r20Detailed comparison
| Metric | 245/45 R20 | 285/35 R20 | Difference |
|---|---|---|---|
| Overall diameter | 728.5 mm | 707.5 mm | -21.0 mm (-2.88%) |
| Sidewall height | 110.3 mm | 99.8 mm | -10.5 mm |
| Circumference | 2.289 m | 2.223 m | -66.0 mm |
| Revs / km | 436.9 | 449.9 | +13.0 |
| Ground clearance | reference | -10.5 mm | -10.5 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 97.1 km/h | -2.88 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 97.1 km/h after switching to 285/35 R20 — a -2.88% 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 -10.5 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.
Back to
245/45 R20
Back to
285/35 R20
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