245/40R19
Most common 19″ sizeCommon fitments: Model 3, Model Y, Camry XSE
Overall diameter
26.72″
679 mm
Sidewall height
3.86″
98.0 mm
Tread width
245 mm
9.6″
Circumference
83.93″
7.0 ft
Revs per mile
755
469 per km
Wheel diameter
19″
aspect ratio 40%
Cross-section
- Overall diameter
- 26.72″
- Sidewall (each side)
- 3.86″
- Wheel
- 19″
245/40R19 compared with other sizes
All 37 practical swaps involving 245/40R19 — diameter change, speedometer impact and a fit verdict for each.
245/40R19 → 225/55R17
225/55R17
Diameter −0.1% · Good fit
245/40R19 → 245/45R18
245/45R18
Diameter +0.1% · Good fit
245/40R19 → 235/40R19
235/40R19
Diameter +1.2% · Good fit
245/40R19 → 245/35R19
245/35R19
Diameter +3.7% · Marginal fit — proceed with care
235/40R19 → 245/40R19
235/40R19
Diameter −1.2% · Good fit
255/40R19 → 245/40R19
255/40R19
Diameter +1.2% · Good fit
235/45R19 → 245/40R19
235/45R19
Diameter +2.3% · Good fit
245/35R19 → 245/40R19
245/35R19
Diameter −3.6% · Marginal fit — proceed with care
245/45R19 → 245/40R19
245/45R19
Diameter +3.6% · Marginal fit — proceed with care
255/35R19 → 245/40R19
255/35R19
Diameter −2.6% · Good fit
275/40R19 → 245/40R19
275/40R19
Diameter +3.5% · Marginal fit — proceed with care
245/45R18 → 245/40R19
245/45R18
Diameter −0.1% · Good fit
245/35R20 → 245/40R19
245/35R20
Diameter +0.1% · Good fit
255/45R19 → 245/40R19
255/45R19
Diameter +4.9% · Marginal fit — proceed with care
225/55R17 → 245/40R19
225/55R17
Diameter +0.1% · Good fit
255/35R20 → 245/40R19
255/35R20
Diameter +1.2% · Good fit
255/45R18 → 245/40R19
255/45R18
Diameter +1.2% · Good fit
235/45R18 → 245/40R19
235/45R18
Diameter −1.5% · Good fit
245/40R19 → 245/45R19
245/45R19
Diameter −3.5% · Marginal fit — proceed with care
245/40R19 → 255/35R19
255/35R19
Diameter +2.6% · Good fit
245/40R19 → 255/40R19
255/40R19
Diameter −1.2% · Good fit
245/40R19 → 275/40R19
275/40R19
Diameter −3.4% · Marginal fit — proceed with care
245/40R19 → 245/35R20
245/35R20
Diameter −0.1% · Good fit
245/40R19 → 255/35R20
255/35R20
Diameter −1.2% · Good fit
245/40R19 → 235/45R19
235/45R19
Diameter −2.2% · Good fit
245/40R19 → 235/50R19
235/50R19
Diameter −5.4% · Not recommended
245/40R19 → 255/45R19
255/45R19
Diameter −4.7% · Marginal fit — proceed with care
245/40R19 → 265/35R20
265/35R20
Diameter −2.1% · Good fit
265/50R19 → 245/40R19
265/50R19
Diameter +10.2% · Not recommended
235/50R19 → 245/40R19
235/50R19
Diameter +5.7% · Not recommended
235/55R19 → 245/40R19
235/55R19
Diameter +9.2% · Not recommended
245/55R19 → 245/40R19
245/55R19
Diameter +10.8% · Not recommended
255/50R19 → 245/40R19
255/50R19
Diameter +8.7% · Not recommended
255/60R19 → 245/40R19
255/60R19
Diameter +16.2% · Not recommended
265/55R19 → 245/40R19
265/55R19
Diameter +14.1% · Not recommended
275/55R19 → 245/40R19
275/55R19
Diameter +15.7% · Not recommended
245/40R19 → 235/45R18
235/45R18
Diameter +1.5% · Good fit
Common questions
- What is the overall diameter of a 245/40R19 tire?
- A 245/40R19 tire is about 26.72″ (679 mm) in overall diameter, with a sidewall height of 98.0 mm and a circumference of 83.93″.
- How many revolutions per mile does a 245/40R19 tire turn?
- A 245/40R19 turns roughly 755 revolutions per mile (469 per kilometre). This is the number that determines speedometer and odometer accuracy when you change tire size.
- What do the numbers in 245/40R19 mean?
- 245 is the tread width in millimetres, 40 is the aspect ratio — the sidewall height as a percentage of the tread width — and 19 is the wheel diameter in inches. So the sidewall is 245 × 40% = 98.0 mm tall.