305/30R26 tire size
305/30R26 is a metric size: 33.2" tall, 12.0" wide, on a 26" rim — about a 33x12.00R26. The sidewall is 3.6" and the tire turns 607 times per mile.
305/30R26 specs
| Overall diameter (height) | 33.20" · 843 mm |
|---|---|
| Section width | 12.01" · 305 mm |
| Sidewall height | 3.60" · 92 mm (30% of width) |
| Rim diameter | 26" |
| Circumference | 104.32" · 2.650 m |
| Revolutions per mile | 607 (377 per km) |
| Inch (flotation) equivalent | 33x12.00R26 |
Equivalent sizes on a 26" 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 | |
|---|---|---|---|---|---|
| 295/30R26 | 32.97" | -0.71% | -10 mm | 59.6 mph | calculate → |
Try another size against 305/30R26
Questions
What size is 305/30R26 in inches?
305/30R26 is about 33.2" tall and 12.0" wide on a 26-inch rim — roughly a 33x12.00R26 in inch sizing.
What does 305/30R26 mean?
305 mm section width, sidewall 30% of the width (3.60"), radial construction, 26-inch rim.
What tire sizes are equivalent to 305/30R26?
On the same 26" rim, within 3% of the diameter: 295/30R26 (-0.71%).
How many revolutions per mile does a 305/30R26 tire make?
About 607 revolutions per mile (circumference 104.3").
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.