Comparison
245/45 R17 vs 255/35 R19
255/35 R19 is a plus-2 alternative to 245/45 R17 — the bigger wheel shows through a thinner sidewall. This setup lands within OEM rolling-diameter tolerance.
Speedometer drift stays small enough that most drivers won't notice it day to day. The shorter sidewall gives the tire a firmer, more responsive feel and sharpens steering input. Extra width broadens the footprint for more grip, but check inner liner and strut clearance before fitting. The larger wheel shows more of the brake hardware and tightens up the wheel-gap look. Overall the swap sits inside the safe ±3% diameter window, so ABS, traction control and gearing behave normally.
TakeCommon upgrade for sportier handling and a tighter wheel-gap look on the same vehicle.
Quick math: 255/35 R19 is 8.8 mm taller than 245/45 R17, shifting the speedometer by +1.35%.
Current Tire
New Tire
Ground line · scaled comparison
Excellent Fit
Within ±3% — safe for daily driving
Diameter change
+8.8 mm
1.35%
Speedometer at 100
101.3 km/h
+1.35% error
Ground clearance
+4.4 mm
ride height delta
Sidewall change
-21.0 mm
revs/km: 481.5
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/compare/245-45-r17-vs-255-35-r19Detailed comparison
| Metric | 245/45 R17 | 255/35 R19 | Difference |
|---|---|---|---|
| Overall diameter | 652.3 mm | 661.1 mm | +8.8 mm (+1.35%) |
| Sidewall height | 110.3 mm | 89.3 mm | -21.0 mm |
| Circumference | 2.049 m | 2.077 m | +27.6 mm |
| Revs / km | 488.0 | 481.5 | -6.5 |
| Ground clearance | reference | +4.4 mm | +4.4 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 101.3 km/h | +1.35 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 101.3 km/h after switching to 255/35 R19 — a +1.35% 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 +4.4 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 R17
Back to
255/35 R19
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