305/65R17 tire size
305/65R17 is a metric size: 32.6" tall, 12.0" wide, on a 17" rim — about a 32.5x12.00R17. The sidewall is 7.8" and the tire turns 618 times per mile.
305/65R17 specs
| Overall diameter (height) | 32.61" · 828 mm |
|---|---|
| Section width | 12.01" · 305 mm |
| Sidewall height | 7.81" · 198 mm (65% of width) |
| Rim diameter | 17" |
| Circumference | 102.45" · 2.602 m |
| Revolutions per mile | 618 (384 per km) |
| Inch (flotation) equivalent | 32.5x12.00R17 |
Equivalent sizes on a 17" 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 | |
|---|---|---|---|---|---|
| 265/70R17 common | 31.61" | -3.08% | -40 mm | 58.2 mph | compare → |
| 285/70R17 common | 32.71" | +0.30% | -20 mm | 60.2 mph | compare → |
| 245/75R17 common | 31.47" | -3.50% | -60 mm | 57.9 mph | compare → |
| 235/80R17 common | 31.80" | -2.47% | -70 mm | 58.5 mph | compare → |
| 255/70R17 common | 31.06" | -4.77% | -50 mm | 57.1 mph | compare → |
| 255/75R17 | 32.06" | -1.69% | -50 mm | 59.0 mph | compare → |
| 295/70R17 | 33.26" | +1.99% | -10 mm | 61.2 mph | compare → |
| 285/75R17 | 33.83" | +3.74% | -20 mm | 62.2 mph | compare → |
| 33x12.50R17 | 33.00" | +1.20% | +13 mm | 60.7 mph | compare → |
| 275/70R17 | 32.16" | -1.39% | -30 mm | 59.2 mph | compare → |
| 255/80R17 | 33.06" | +1.39% | -50 mm | 60.8 mph | compare → |
| 305/70R17 | 33.81" | +3.68% | 0 mm | 62.2 mph | compare → |
| 275/65R17 | 31.07" | -4.71% | -30 mm | 57.2 mph | calculate → |
| 285/65R17 | 31.59" | -3.14% | -20 mm | 58.1 mph | calculate → |
| 34x10.50R17 | 34.00" | +4.26% | -38 mm | 62.6 mph | calculate → |
| 33x10.50R17 | 33.00" | +1.20% | -38 mm | 60.7 mph | calculate → |
| 33x11.50R17 | 33.00" | +1.20% | -13 mm | 60.7 mph | calculate → |
| 33x13.50R17 | 33.00" | +1.20% | +38 mm | 60.7 mph | calculate → |
| 33x13.00R17 | 33.00" | +1.20% | +25 mm | 60.7 mph | calculate → |
| 33x9.50R17 | 33.00" | +1.20% | -64 mm | 60.7 mph | calculate → |
| 32x11.50R17 | 32.00" | -1.87% | -13 mm | 58.9 mph | calculate → |
| 315/60R17 | 31.88" | -2.23% | +10 mm | 58.7 mph | calculate → |
| 255/85R17 | 34.07" | +4.47% | -50 mm | 62.7 mph | calculate → |
| 31x10.50R17 | 31.00" | -4.94% | -38 mm | 57.0 mph | calculate → |
| 235/85R17 | 32.73" | +0.36% | -70 mm | 60.2 mph | calculate → |
| 32x10.50R17 | 32.00" | -1.87% | -38 mm | 58.9 mph | calculate → |
Plus / minus sizing: 16" and 18" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 265/70R18 common | 32.61" | -0.01% | -40 mm | 60.0 mph | compare → |
| 285/75R16 common | 32.83" | +0.68% | -20 mm | 60.4 mph | compare → |
| 285/65R18 common | 32.59" | -0.07% | -20 mm | 60.0 mph | compare → |
| 305/70R16 | 32.81" | +0.62% | 0 mm | 60.4 mph | compare → |
| 305/60R18 | 32.41" | -0.62% | 0 mm | 59.6 mph | compare → |
| 245/75R18 | 32.47" | -0.43% | -60 mm | 59.7 mph | calculate → |
| 265/80R16 | 32.69" | +0.25% | -40 mm | 60.2 mph | calculate → |
| 235/80R18 | 32.80" | +0.59% | -70 mm | 60.4 mph | calculate → |
Try another size against 305/65R17
Questions
What size is 305/65R17 in inches?
305/65R17 is about 32.6" tall and 12.0" wide on a 17-inch rim — roughly a 32.5x12.00R17 in inch sizing.
What does 305/65R17 mean?
305 mm section width, sidewall 65% of the width (7.81"), radial construction, 17-inch rim.
What tire sizes are equivalent to 305/65R17?
On the same 17" rim, within 3% of the diameter: 285/70R17 (+0.30%), 235/85R17 (+0.36%), 33x10.50R17 (+1.20%), 33x11.50R17 (+1.20%), 33x12.50R17 (+1.20%), 33x13.50R17 (+1.20%).
How many revolutions per mile does a 305/65R17 tire make?
About 618 revolutions per mile (circumference 102.4").
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.