235/40R19
Common fitments: Model 3 Performance, Giulia
Overall diameter
26.40″
671 mm
Sidewall height
3.70″
94.0 mm
Tread width
235 mm
9.3″
Circumference
82.94″
6.9 ft
Revs per mile
764
475 per km
Wheel diameter
19″
aspect ratio 40%
Cross-section
- Overall diameter
- 26.40″
- Sidewall (each side)
- 3.70″
- Wheel
- 19″
235/40R19 compared with other sizes
All 26 practical swaps involving 235/40R19 — diameter change, speedometer impact and a fit verdict for each.
235/40R19 → 215/55R17
215/55R17
Diameter +0.3% · Good fit
235/40R19 → 235/45R18
235/45R18
Diameter +0.3% · Good fit
235/40R19 → 245/45R18
245/45R18
Diameter −1.0% · Good fit
245/40R19 → 235/40R19
245/40R19
Diameter +1.2% · Good fit
255/35R19 → 235/40R19
255/35R19
Diameter −1.4% · Good fit
235/45R19 → 235/40R19
235/45R19
Diameter +3.5% · Marginal fit — proceed with care
255/40R19 → 235/40R19
255/40R19
Diameter +2.4% · Good fit
245/35R19 → 235/40R19
245/35R19
Diameter −2.5% · Good fit
235/45R18 → 235/40R19
235/45R18
Diameter −0.3% · Good fit
275/40R19 → 235/40R19
275/40R19
Diameter +4.8% · Marginal fit — proceed with care
245/45R19 → 235/40R19
245/45R19
Diameter +4.8% · Marginal fit — proceed with care
215/55R17 → 235/40R19
215/55R17
Diameter −0.3% · Good fit
245/45R18 → 235/40R19
245/45R18
Diameter +1.1% · Good fit
225/55R17 → 235/40R19
225/55R17
Diameter +1.3% · Good fit
245/35R20 → 235/40R19
245/35R20
Diameter +1.3% · Good fit
255/40R18 → 235/40R19
255/40R18
Diameter −1.4% · Good fit
225/45R18 → 235/40R19
225/45R18
Diameter −1.6% · Good fit
235/40R19 → 245/35R19
245/35R19
Diameter +2.5% · Good fit
235/40R19 → 245/40R19
245/40R19
Diameter −1.2% · Good fit
235/40R19 → 245/45R19
245/45R19
Diameter −4.6% · Marginal fit — proceed with care
235/40R19 → 255/35R19
255/35R19
Diameter +1.4% · Good fit
235/40R19 → 255/40R19
255/40R19
Diameter −2.3% · Good fit
235/40R19 → 275/40R19
275/40R19
Diameter −4.6% · Marginal fit — proceed with care
235/40R19 → 245/35R20
245/35R20
Diameter −1.3% · Good fit
235/40R19 → 255/35R20
255/35R20
Diameter −2.3% · Good fit
235/40R19 → 235/45R19
235/45R19
Diameter −3.4% · Marginal fit — proceed with care
Common questions
- What is the overall diameter of a 235/40R19 tire?
- A 235/40R19 tire is about 26.40″ (671 mm) in overall diameter, with a sidewall height of 94.0 mm and a circumference of 82.94″.
- How many revolutions per mile does a 235/40R19 tire turn?
- A 235/40R19 turns roughly 764 revolutions per mile (475 per kilometre). This is the number that determines speedometer and odometer accuracy when you change tire size.
- What do the numbers in 235/40R19 mean?
- 235 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 235 × 40% = 94.0 mm tall.