Comparison
295/35 R20 vs 295/40 R20
295/40 R20 is a taller-sidewall alternative to 295/35 R20 on the same 20-inch rim. This alternative fitment swings rolling diameter far enough to feel on the road.
Indicated speed will drift far enough that recalibration is worth considering. The taller sidewall adds cushioning over potholes and rougher roads, with a softer overall ride. The 3–5% diameter gap puts this in caution territory: doable on many cars, but verify clearance and consider recalibration.
TakeA comfort-leaning direction that's easier on wheels and suspension over rough surfaces.
Quick math: 295/40 R20 is 29.5 mm taller than 295/35 R20, shifting the speedometer by +4.13%.
Current Tire
New Tire
Ground line · scaled comparison
Slight Difference
Within ±5% — usable, recalibration recommended
Diameter change
+29.5 mm
4.13%
Speedometer at 100
104.1 km/h
+4.13% error
Ground clearance
+14.8 mm
ride height delta
Sidewall change
+14.8 mm
revs/km: 427.8
Permalink for this comparison:
/compare/295-35-r20-vs-295-40-r20Detailed comparison
| Metric | 295/35 R20 | 295/40 R20 | Difference |
|---|---|---|---|
| Overall diameter | 714.5 mm | 744.0 mm | +29.5 mm (+4.13%) |
| Sidewall height | 103.3 mm | 118.0 mm | +14.8 mm |
| Circumference | 2.245 m | 2.337 m | +92.7 mm |
| Revs / km | 445.5 | 427.8 | -17.7 |
| Ground clearance | reference | +14.8 mm | +14.8 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 104.1 km/h | +4.13 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 104.1 km/h after switching to 295/40 R20 — a +4.13% 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 +14.8 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
295/35 R20
Back to
295/40 R20
Drivers also compare
Closely-related fitments and plus-size swaps for 295/35 R20 and 295/40 R20.
265/40 R20 vs 295/35 R20
Wider variation on the same rim — more grip, less clearance.
Δ 0.76%
255/45 R20 vs 295/40 R20
Wider variation on the same rim — more grip, less clearance.
Δ 0.88%
285/35 R20 vs 295/35 R20
Wider variation on the same rim — more grip, less clearance.
Δ 0.99%
245/40 R20 vs 295/35 R20
Wider variation on the same rim — more grip, less clearance.
Δ 1.49%
275/45 R20 vs 295/40 R20
Wider variation on the same rim — more grip, less clearance.
Δ 1.52%
275/40 R20 vs 295/35 R20
Wider variation on the same rim — more grip, less clearance.
Δ 1.85%
245/45 R20 vs 295/35 R20
Wider variation on the same rim — more grip, less clearance.
Δ 1.92%
275/35 R20 vs 295/35 R20
Wider variation on the same rim — more grip, less clearance.
Δ 2.00%
Related topics