Comparison
265/35 R20 vs 295/35 R20
Stepping from 265/35 R20 to 295/35 R20 keeps the 20-inch wheel but widens the section by 30 mm. This setup noticeably changes overall diameter compared to OEM.
Indicated speed will drift far enough that recalibration is worth considering. Extra width broadens the footprint for more grip, but check inner liner and strut clearance before fitting. The 3–5% diameter gap puts this in caution territory: doable on many cars, but verify clearance and consider recalibration.
TakeUseful when extra dry grip and stance matter more than a small fuel-economy hit.
Quick math: 295/35 R20 is 21.0 mm taller than 265/35 R20, shifting the speedometer by +3.03%.
Current Tire
New Tire
Ground line · scaled comparison
Slight Difference
Within ±5% — usable, recalibration recommended
Diameter change
+21.0 mm
3.03%
Speedometer at 100
103.0 km/h
+3.03% error
Ground clearance
+10.5 mm
ride height delta
Sidewall change
+10.5 mm
revs/km: 445.5
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/compare/265-35-r20-vs-295-35-r20Detailed comparison
| Metric | 265/35 R20 | 295/35 R20 | Difference |
|---|---|---|---|
| Overall diameter | 693.5 mm | 714.5 mm | +21.0 mm (+3.03%) |
| Sidewall height | 92.8 mm | 103.3 mm | +10.5 mm |
| Circumference | 2.179 m | 2.245 m | +66.0 mm |
| Revs / km | 459.0 | 445.5 | -13.5 |
| Ground clearance | reference | +10.5 mm | +10.5 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 103.0 km/h | +3.03 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 103.0 km/h after switching to 295/35 R20 — a +3.03% 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.
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265/35 R20
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295/35 R20
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