265/35R21 tire size
265/35R21 is a metric size: 28.3" tall, 10.4" wide, on a 21" rim — about a 28.5x10.50R21. The sidewall is 3.7" and the tire turns 713 times per mile.
265/35R21 specs
| Overall diameter (height) | 28.30" · 719 mm |
|---|---|
| Section width | 10.43" · 265 mm |
| Sidewall height | 3.65" · 93 mm (35% of width) |
| Rim diameter | 21" |
| Circumference | 88.92" · 2.258 m |
| Revolutions per mile | 713 (443 per km) |
| Inch (flotation) equivalent | 28.5x10.50R21 |
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" | +3.69% | 0 mm | 62.2 mph | compare → |
| 275/35R21 common | 28.58" | +0.97% | +10 mm | 60.6 mph | compare → |
| 295/35R21 | 29.13" | +2.92% | +30 mm | 61.8 mph | compare → |
| 255/40R21 | 29.03" | +2.57% | -10 mm | 61.5 mph | compare → |
| 245/35R21 | 27.75" | -1.95% | -20 mm | 58.8 mph | compare → |
| 325/30R21 | 28.68" | +1.32% | +60 mm | 60.8 mph | compare → |
| 275/40R21 | 29.66" | +4.80% | +10 mm | 62.9 mph | compare → |
| 255/35R21 | 28.03" | -0.97% | -10 mm | 59.4 mph | compare → |
| 315/30R21 | 28.44" | +0.49% | +50 mm | 60.3 mph | compare → |
| 285/35R21 | 28.85" | +1.95% | +20 mm | 61.2 mph | compare → |
| 245/40R21 | 28.72" | +1.46% | -20 mm | 60.9 mph | compare → |
| 315/35R21 | 29.68" | +4.87% | +50 mm | 62.9 mph | compare → |
| 305/30R21 | 28.20" | -0.35% | +40 mm | 59.8 mph | compare → |
| 295/30R21 | 27.97" | -1.18% | +30 mm | 59.3 mph | compare → |
| 285/30R21 | 27.73" | -2.02% | +20 mm | 58.8 mph | compare → |
| 275/30R21 | 27.50" | -2.85% | +10 mm | 58.3 mph | compare → |
| 245/45R21 | 29.68" | +4.87% | -20 mm | 62.9 mph | compare → |
| 255/30R21 | 27.02" | -4.52% | -10 mm | 57.3 mph | calculate → |
| 355/25R21 | 27.99" | -1.11% | +90 mm | 59.3 mph | calculate → |
| 235/45R21 | 29.33" | +3.62% | -30 mm | 62.2 mph | calculate → |
| 335/30R21 | 28.91" | +2.16% | +70 mm | 61.3 mph | calculate → |
| 305/35R21 | 29.41" | +3.89% | +40 mm | 62.3 mph | calculate → |
| 345/30R21 | 29.15" | +2.99% | +80 mm | 61.8 mph | calculate → |
| 265/30R21 | 27.26" | -3.69% | 0 mm | 57.8 mph | calculate → |
| 345/25R21 | 27.79" | -1.81% | +80 mm | 58.9 mph | calculate → |
| 225/45R21 | 28.97" | +2.36% | -40 mm | 61.4 mph | calculate → |
| 325/25R21 | 27.40" | -3.20% | +60 mm | 58.1 mph | calculate → |
| 305/25R21 | 27.00" | -4.59% | +40 mm | 57.2 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 | |
|---|---|---|---|---|---|
| 255/40R20 common | 28.03" | -0.96% | -10 mm | 59.4 mph | compare → |
| 295/35R20 | 28.13" | -0.61% | +30 mm | 59.6 mph | compare → |
| 305/35R20 | 28.41" | +0.36% | +40 mm | 60.2 mph | compare → |
| 235/45R20 | 28.33" | +0.08% | -30 mm | 60.1 mph | compare → |
| 265/40R20 | 28.35" | +0.15% | 0 mm | 60.1 mph | compare → |
| 265/30R22 | 28.26" | -0.15% | 0 mm | 59.9 mph | compare → |
| 255/30R22 | 28.02" | -0.99% | -10 mm | 59.4 mph | compare → |
| 345/30R20 | 28.15" | -0.54% | +80 mm | 59.7 mph | calculate → |
| 315/25R22 | 28.20" | -0.36% | +50 mm | 59.8 mph | calculate → |
| 275/30R22 | 28.50" | +0.68% | +10 mm | 60.4 mph | calculate → |
| 195/55R20 | 28.44" | +0.50% | -70 mm | 60.3 mph | calculate → |
Try another size against 265/35R21
Questions
What size is 265/35R21 in inches?
265/35R21 is about 28.3" tall and 10.4" wide on a 21-inch rim — roughly a 28.5x10.50R21 in inch sizing.
What does 265/35R21 mean?
265 mm section width, sidewall 35% of the width (3.65"), radial construction, 21-inch rim.
What tire sizes are equivalent to 265/35R21?
On the same 21" rim, within 3% of the diameter: 305/30R21 (-0.35%), 315/30R21 (+0.49%), 275/35R21 (+0.97%), 255/35R21 (-0.97%), 355/25R21 (-1.11%), 295/30R21 (-1.18%).
How many revolutions per mile does a 265/35R21 tire make?
About 713 revolutions per mile (circumference 88.9").
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.