335/30R21 tire size
335/30R21 is a metric size: 28.9" tall, 13.2" wide, on a 21" rim — about a 29x13.00R21. The sidewall is 4.0" and the tire turns 698 times per mile.
335/30R21 specs
| Overall diameter (height) | 28.91" · 734 mm |
|---|---|
| Section width | 13.19" · 335 mm |
| Sidewall height | 3.96" · 101 mm (30% of width) |
| Rim diameter | 21" |
| Circumference | 90.83" · 2.307 m |
| Revolutions per mile | 698 (433 per km) |
| Inch (flotation) equivalent | 29x13.00R21 |
Equivalent sizes on a 21" 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 | |
|---|---|---|---|---|---|
| 265/40R21 common | 29.35" | +1.50% | -70 mm | 60.9 mph | calculate → |
| 275/35R21 common | 28.58" | -1.16% | -60 mm | 59.3 mph | calculate → |
| 295/35R21 | 29.13" | +0.75% | -40 mm | 60.4 mph | calculate → |
| 255/40R21 | 29.03" | +0.41% | -80 mm | 60.2 mph | calculate → |
| 265/35R21 | 28.30" | -2.11% | -70 mm | 58.7 mph | calculate → |
| 245/35R21 | 27.75" | -4.02% | -90 mm | 57.6 mph | calculate → |
| 295/40R21 | 30.29" | +4.77% | -40 mm | 62.9 mph | calculate → |
| 285/40R21 | 29.98" | +3.68% | -50 mm | 62.2 mph | calculate → |
| 325/30R21 | 28.68" | -0.82% | -10 mm | 59.5 mph | calculate → |
| 275/40R21 | 29.66" | +2.59% | -60 mm | 61.6 mph | calculate → |
| 255/35R21 | 28.03" | -3.06% | -80 mm | 58.2 mph | calculate → |
| 285/35R21 | 28.85" | -0.20% | -50 mm | 59.9 mph | calculate → |
| 315/30R21 | 28.44" | -1.63% | -20 mm | 59.0 mph | calculate → |
| 245/40R21 | 28.72" | -0.68% | -90 mm | 59.6 mph | calculate → |
| 315/35R21 | 29.68" | +2.66% | -20 mm | 61.6 mph | calculate → |
| 305/30R21 | 28.20" | -2.45% | -30 mm | 58.5 mph | calculate → |
| 295/30R21 | 27.97" | -3.27% | -40 mm | 58.0 mph | calculate → |
| 255/45R21 | 30.04" | +3.88% | -80 mm | 62.3 mph | calculate → |
| 285/30R21 | 27.73" | -4.08% | -50 mm | 57.5 mph | calculate → |
| 245/45R21 | 29.68" | +2.66% | -90 mm | 61.6 mph | calculate → |
| 275/30R21 | 27.50" | -4.90% | -60 mm | 57.1 mph | calculate → |
| 235/50R21 | 30.25" | +4.63% | -100 mm | 62.8 mph | calculate → |
| 355/25R21 | 27.99" | -3.20% | +20 mm | 58.1 mph | calculate → |
| 235/45R21 | 29.33" | +1.43% | -100 mm | 60.9 mph | calculate → |
| 305/35R21 | 29.41" | +1.70% | -30 mm | 61.0 mph | calculate → |
| 345/30R21 | 29.15" | +0.82% | +10 mm | 60.5 mph | calculate → |
| 225/45R21 | 28.97" | +0.20% | -110 mm | 60.1 mph | calculate → |
| 345/25R21 | 27.79" | -3.88% | +10 mm | 57.7 mph | calculate → |
Plus / minus sizing: 20" and 22" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 245/45R20 common | 28.68" | -0.80% | -90 mm | 59.5 mph | calculate → |
| 255/45R20 common | 29.04" | +0.42% | -80 mm | 60.3 mph | calculate → |
| 275/40R20 common | 28.66" | -0.87% | -60 mm | 59.5 mph | calculate → |
| 315/35R20 common | 28.68" | -0.80% | -20 mm | 59.5 mph | calculate → |
| 285/40R20 | 28.98" | +0.22% | -50 mm | 60.1 mph | calculate → |
| 285/30R22 | 28.73" | -0.63% | -50 mm | 59.6 mph | calculate → |
| 295/30R22 | 28.97" | +0.19% | -40 mm | 60.1 mph | calculate → |
| 255/35R22 | 29.03" | +0.39% | -80 mm | 60.2 mph | calculate → |
| 325/35R20 | 28.96" | +0.15% | -10 mm | 60.1 mph | calculate → |
| 355/25R22 | 28.99" | +0.26% | +20 mm | 60.2 mph | calculate → |
| 29x15.00R20 | 29.00" | +0.30% | +46 mm | 60.2 mph | calculate → |
| 29x18.00R20 | 29.00" | +0.30% | +122 mm | 60.2 mph | calculate → |
Try another size against 335/30R21
Questions
What size is 335/30R21 in inches?
335/30R21 is about 28.9" tall and 13.2" wide on a 21-inch rim — roughly a 29x13.00R21 in inch sizing.
What does 335/30R21 mean?
335 mm section width, sidewall 30% of the width (3.96"), radial construction, 21-inch rim.
What tire sizes are equivalent to 335/30R21?
On the same 21" rim, within 3% of the diameter: 285/35R21 (-0.20%), 225/45R21 (+0.20%), 255/40R21 (+0.41%), 245/40R21 (-0.68%), 295/35R21 (+0.75%), 325/30R21 (-0.82%).
How many revolutions per mile does a 335/30R21 tire make?
About 698 revolutions per mile (circumference 90.8").
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.