41x14.50R18 tire size
41x14.50R18 is a flotation (inch) size: 41.0" tall, 14.5" wide, on a 18" rim — about a 370/80R18. The sidewall is 11.5" and the tire turns 492 times per mile.
41x14.50R18 specs
| Overall diameter (height) | 41.00" · 1041 mm |
|---|---|
| Section width | 14.50" · 368 mm |
| Sidewall height | 11.50" · 292 mm (79% of width) |
| Rim diameter | 18" |
| Circumference | 128.81" · 3.272 m |
| Revolutions per mile | 492 (306 per km) |
| Closest metric size | 370/80R18 |
Equivalent sizes on a 18" 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 | |
|---|---|---|---|---|---|
| 40x13.50R18 | 40.00" | -2.44% | -25 mm | 58.5 mph | calculate → |
| 40x14.50R18 | 40.00" | -2.44% | 0 mm | 58.5 mph | calculate → |
Plus / minus sizing: 17" and 19" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 41x14.50R17 | 41.00" | 0.00% | 0 mm | 60.0 mph | calculate → |
Try another size against 41x14.50R18
Questions
What size is 41x14.50R18 in inches?
41x14.50R18 is about 41.0" tall and 14.5" wide on a 18-inch rim — roughly a 370/80R18 in inch sizing.
What does 41x14.50R18 mean?
41" overall diameter, 14.50" section width, radial, 18" rim.
What tire sizes are equivalent to 41x14.50R18?
On the same 18" rim, within 3% of the diameter: 40x13.50R18 (-2.44%), 40x14.50R18 (-2.44%).
How many revolutions per mile does a 41x14.50R18 tire make?
About 492 revolutions per mile (circumference 128.8").
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.