235/40R19 tire size
235/40R19 is a metric size: 26.4" tall, 9.3" wide, on a 19" rim — about a 26.5x9.50R19. The sidewall is 3.7" and the tire turns 764 times per mile.
235/40R19 specs
| Overall diameter (height) | 26.40" · 671 mm |
|---|---|
| Section width | 9.25" · 235 mm |
| Sidewall height | 3.70" · 94 mm (40% of width) |
| Rim diameter | 19" |
| Circumference | 82.94" · 2.107 m |
| Revolutions per mile | 764 (475 per km) |
| Inch (flotation) equivalent | 26.5x9.50R19 |
Equivalent sizes on a 19" rim
Sizes within ±5% of the overall diameter. Green rows are inside the usual ±3% limit for keeping the speedometer, ABS and gearing right; red rows are bigger changes that need clearance checks.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 245/45R19 common | 27.68" | +4.85% | +10 mm | 62.9 mph | compare → |
| 245/40R19 common | 26.72" | +1.19% | +10 mm | 60.7 mph | compare → |
| 255/40R19 common | 27.03" | +2.39% | +20 mm | 61.4 mph | compare → |
| 255/35R19 common | 26.03" | -1.42% | +20 mm | 59.2 mph | compare → |
| 275/35R19 common | 26.58" | +0.67% | +40 mm | 60.4 mph | compare → |
| 275/40R19 common | 27.66" | +4.77% | +40 mm | 62.9 mph | compare → |
| 245/35R19 common | 25.75" | -2.46% | +10 mm | 58.5 mph | compare → |
| 225/40R19 common | 26.09" | -1.19% | -10 mm | 59.3 mph | compare → |
| 235/35R19 common | 25.48" | -3.50% | 0 mm | 57.9 mph | compare → |
| 225/45R19 common | 26.97" | +2.16% | -10 mm | 61.3 mph | compare → |
| 285/35R19 common | 26.85" | +1.71% | +50 mm | 61.0 mph | compare → |
| 265/35R19 common | 26.30" | -0.37% | +30 mm | 59.8 mph | compare → |
| 235/45R19 common | 27.33" | +3.50% | 0 mm | 62.1 mph | compare → |
| 285/30R19 | 25.73" | -2.54% | +50 mm | 58.5 mph | compare → |
| 225/35R19 | 25.20" | -4.55% | -10 mm | 57.3 mph | compare → |
| 305/30R19 | 26.20" | -0.75% | +70 mm | 59.6 mph | compare → |
| 295/30R19 | 25.97" | -1.64% | +60 mm | 59.0 mph | compare → |
| 325/30R19 | 26.68" | +1.04% | +90 mm | 60.6 mph | compare → |
| 265/40R19 | 27.35" | +3.58% | +30 mm | 62.1 mph | compare → |
| 275/30R19 | 25.50" | -3.43% | +40 mm | 57.9 mph | compare → |
| 265/30R19 | 25.26" | -4.32% | +30 mm | 57.4 mph | compare → |
| 295/35R19 | 27.13" | +2.76% | +60 mm | 61.7 mph | compare → |
| 345/30R19 | 27.15" | +2.83% | +110 mm | 61.7 mph | compare → |
| 315/30R19 | 26.44" | +0.15% | +80 mm | 60.1 mph | compare → |
| 305/35R19 | 27.41" | +3.80% | +70 mm | 62.3 mph | calculate → |
| 155/70R19 | 27.54" | +4.32% | -80 mm | 62.6 mph | calculate → |
| 355/30R19 | 27.39" | +3.73% | +120 mm | 62.2 mph | calculate → |
| 215/50R19 | 27.46" | +4.03% | -20 mm | 62.4 mph | calculate → |
| 195/50R19 | 26.68" | +1.04% | -40 mm | 60.6 mph | calculate → |
| 175/60R19 | 27.27" | +3.28% | -60 mm | 62.0 mph | calculate → |
| 315/25R19 | 25.20" | -4.55% | +80 mm | 57.3 mph | calculate → |
| 335/30R19 | 26.91" | +1.94% | +100 mm | 61.2 mph | calculate → |
| 315/35R19 | 27.68" | +4.85% | +80 mm | 62.9 mph | calculate → |
Plus / minus sizing: 18" and 20" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 235/45R18 common | 26.33" | -0.28% | 0 mm | 59.8 mph | compare → |
| 275/40R18 common | 26.66" | +0.98% | +40 mm | 60.6 mph | compare → |
| 275/30R20 common | 26.50" | +0.36% | +40 mm | 60.2 mph | compare → |
| 235/35R20 | 26.48" | +0.28% | 0 mm | 60.2 mph | compare → |
| 265/40R18 | 26.35" | -0.21% | +30 mm | 59.9 mph | compare → |
| 265/30R20 | 26.26" | -0.54% | +30 mm | 59.7 mph | compare → |
| 225/35R20 | 26.20" | -0.76% | -10 mm | 59.5 mph | compare → |
| 335/25R20 | 26.59" | +0.73% | +100 mm | 60.4 mph | compare → |
| 215/50R18 | 26.46" | +0.24% | -20 mm | 60.1 mph | compare → |
| 325/25R20 | 26.40" | -0.01% | +90 mm | 60.0 mph | calculate → |
| 305/35R18 | 26.41" | +0.01% | +70 mm | 60.0 mph | calculate → |
| 155/70R18 | 26.54" | +0.54% | -80 mm | 60.3 mph | calculate → |
| 315/25R20 | 26.20" | -0.76% | +80 mm | 59.5 mph | calculate → |
| 345/30R18 | 26.15" | -0.95% | +110 mm | 59.4 mph | calculate → |
Try another size against 235/40R19
Questions
What size is 235/40R19 in inches?
235/40R19 is about 26.4" tall and 9.3" wide on a 19-inch rim — roughly a 26.5x9.50R19 in inch sizing.
What does 235/40R19 mean?
235 mm section width, sidewall 40% of the width (3.70"), radial construction, 19-inch rim.
What tire sizes are equivalent to 235/40R19?
On the same 19" rim, within 3% of the diameter: 315/30R19 (+0.15%), 265/35R19 (-0.37%), 275/35R19 (+0.67%), 305/30R19 (-0.75%), 195/50R19 (+1.04%), 325/30R19 (+1.04%).
How many revolutions per mile does a 235/40R19 tire make?
About 764 revolutions per mile (circumference 82.9").
How these numbers are computed
Diameter = rim + 2 × sidewall, sidewall = width × aspect ÷ 100, circumference = π × diameter, revolutions per mile = 63,360 ÷ circumference. Real tires differ by brand by a few tenths of an inch. Last reviewed October 14, 2026.