Comparison
225/40 R19 vs 245/45 R17
Going from 225/40 R19 to 245/45 R17 is a minus-2 setup that adds sidewall on a smaller 17-inch wheel. This swap shifts overall diameter slightly from OEM. More sidewall typically improves comfort and curb protection, especially on city streets.
Expect a slight but noticeable shift in indicated speed compared to the original tires. Diameter change stays inside the conservative ±3% safety window — an OEM-safe fitment on most vehicles.
TakeTypical choice for a dedicated winter or off-road setup where extra sidewall pays off.
Quick math: 245/45 R17 is 10.3 mm shorter than 225/40 R19, shifting the speedometer by -1.55%.
Current Tire
New Tire
Ground line · scaled comparison
Excellent Fit
Within ±3% — safe for daily driving
Diameter change
-10.3 mm
-1.55%
Speedometer at 100
98.4 km/h
-1.55% error
Ground clearance
-5.1 mm
ride height delta
Sidewall change
+20.3 mm
revs/km: 488.0
Permalink for this comparison:
/compare/225-40-r19-vs-245-45-r17Detailed comparison
| Metric | 225/40 R19 | 245/45 R17 | Difference |
|---|---|---|---|
| Overall diameter | 662.6 mm | 652.3 mm | -10.3 mm (-1.55%) |
| Sidewall height | 90.0 mm | 110.3 mm | +20.3 mm |
| Circumference | 2.082 m | 2.049 m | -32.4 mm |
| Revs / km | 480.4 | 488.0 | +7.6 |
| Ground clearance | reference | -5.1 mm | -5.1 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 98.4 km/h | -1.55 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 98.4 km/h after switching to 245/45 R17 — a -1.55% 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 -5.1 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
225/40 R19
Back to
245/45 R17
Drivers also compare
Closely-related fitments and plus-size swaps for 225/40 R19 and 245/45 R17.
225/40 R19 vs 255/35 R19
Wider variation on the same rim — more grip, less clearance.
Δ 0.23%
225/50 R17 vs 245/45 R17
Wider variation on the same rim — more grip, less clearance.
Δ 0.69%
225/40 R19 vs 265/35 R19
Wider variation on the same rim — more grip, less clearance.
Δ 0.83%
215/50 R17 vs 245/45 R17
Wider variation on the same rim — more grip, less clearance.
Δ 0.85%
225/40 R19 vs 235/40 R19
Wider variation on the same rim — more grip, less clearance.
Δ 1.21%
225/40 R19 vs 245/35 R19
Wider variation on the same rim — more grip, less clearance.
Δ 1.28%
235/45 R17 vs 245/45 R17
Wider variation on the same rim — more grip, less clearance.
Δ 1.40%
225/40 R19 vs 275/35 R19
Wider variation on the same rim — more grip, less clearance.
Δ 1.89%
Related topics