235/40R20 vs 265/40R19 tire size comparison
265/40R19 is 0.1 in (0.20%) shorter than 235/40R20 and 1.1 in wider. They fit different wheels: 235/40R20 a 20-inch wheel and 265/40R19 a 19-inch wheel.
235/40R20 and 265/40R19 side by side
| Measurement | 235/40R20 | 265/40R19 | Difference | Difference % |
|---|---|---|---|---|
| Section width | 9.3 in (235 mm) | 10.4 in (265 mm) | +1.1 in (+30 mm) | +12.77% |
| Sidewall height | 3.7 in (94 mm) | 4.2 in (106 mm) | +0.5 in (+12 mm) | +12.77% |
| Wheel (rim) diameter | 20.0 in (508 mm) | 19.0 in (483 mm) | -1.0 in (-25 mm) | -5.00% |
| Overall diameter | 27.4 in (696 mm) | 27.3 in (695 mm) | -0.1 in (-1 mm) | -0.20% |
| Circumference | 86.1 in (2187 mm) | 85.9 in (2182 mm) | -0.2 in (-5 mm) | -0.20% |
| Revolutions per mile | 736 | 738 | +2 | +0.20% |
Differences are 265/40R19 minus 235/40R20; percentages are relative to 235/40R20. These are nominal design dimensions. Real tires vary by brand, tread depth, wheel width, load and pressure.
The overall diameter differs by 0.20%, which is within the common 3% rule of thumb.
The rule of thumb keeps a replacement size within about 3% of the original overall diameter. It covers diameter only. It is not a fit, load or safety check, because width, wheel diameter, load capacity and clearance matter too. Confirm any size change with your vehicle's owner's manual or a tire professional.
Speedometer difference
When the speedometer reads 60 mph on a vehicle built for 235/40R20, the actual speed on 265/40R19 is about 59.9 mph. When it reads 60 mph on a vehicle built for 265/40R19, the actual speed on 235/40R20 is about 60.1 mph. These figures assume the speedometer is accurate on the original size and use nominal dimensions, so treat them as estimates.
| Speedometer reads | Actual on 265/40R19 (built for 235/40R20) | Actual on 235/40R20 (built for 265/40R19) |
|---|---|---|
| 20 mph | 20.0 mph | 20.0 mph |
| 30 mph | 29.9 mph | 30.1 mph |
| 40 mph | 39.9 mph | 40.1 mph |
| 50 mph | 49.9 mph | 50.1 mph |
| 60 mph | 59.9 mph | 60.1 mph |
| 70 mph | 69.9 mph | 70.1 mph |
| 80 mph | 79.8 mph | 80.2 mph |
A common rule of thumb is to keep a replacement size within about 3% of the original overall diameter. Check the tire placard on the driver's door jamb and your owner's manual for the sizes your vehicle was built for. Confirm any size change with your vehicle's owner's manual or a tire professional.
Which vehicles use each size?
These vehicles list the size among their verified sizes, by trim. Open one to see all of its sizes.
235/40R20
265/40R19
Check it in the calculator
The calculator takes the same two sizes and shows the full comparison, or lets you swap either one for another size.
Open this comparison in the calculatorShop for 235/40R20 or 265/40R19 tires
Confirm the size on your tire sidewall or door placard first. These links open each store's own search; prices and stock are on their sites.
235/40R20
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Other comparisons with 235/40R20
Side-by-side dimensions and speedometer difference for sizes close to 235/40R20 in overall diameter.
- 235/40R20 vs 235/45R19-0.27% shorter than 235/40R20
- 215/55R18 vs 235/40R20-0.33% shorter than 235/40R20
- 235/40R20 vs 265/35R20-0.36% shorter than 235/40R20
- 235/40R20 vs 235/50R18-0.55% shorter than 235/40R20
- 235/40R20 vs 275/40R19+0.95% taller than 235/40R20
Other comparisons with 265/40R19
Side-by-side dimensions and speedometer difference for sizes close to 265/40R19 in overall diameter.
- 215/55R18 vs 265/40R19-0.13% shorter than 265/40R19
- 265/35R20 vs 265/40R19-0.16% shorter than 265/40R19
- 235/50R18 vs 265/40R19-0.35% shorter than 265/40R19
- 265/40R19 vs 305/30R20-0.52% shorter than 265/40R19
You might also need
- Digital tire pressure gauge (Amazon search, opens in a new tab)
Check your tire pressure against the number on your door placard.
- Portable tire inflator (Amazon search, opens in a new tab)
Top up a low tire at home without a trip to the gas station.
- Tire tread depth gauge (Amazon search, opens in a new tab)
Measure how much tread is left before you decide to replace.
- Lug wrench or torque wrench (Amazon search, opens in a new tab)
Useful for rotations and tire changes; follow the torque spec in your owner's manual.
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