42x14.50R17 tire size
42x14.50R17 is a flotation (inch) size: 42.0" tall, 14.5" wide, on a 17" rim — about a 370/85R17. The sidewall is 12.5" and the tire turns 480 times per mile.
42x14.50R17 specs
| Overall diameter (height) | 42.00" · 1067 mm |
|---|---|
| Section width | 14.50" · 368 mm |
| Sidewall height | 12.50" · 318 mm (86% of width) |
| Rim diameter | 17" |
| Circumference | 131.95" · 3.351 m |
| Revolutions per mile | 480 (298 per km) |
| Closest metric size | 370/85R17 |
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 | |
|---|---|---|---|---|---|
| 40x13.50R17 | 40.00" | -4.76% | -25 mm | 57.1 mph | calculate → |
| 42x13.50R17 | 42.00" | 0.00% | -25 mm | 60.0 mph | calculate → |
| 42x15.00R17 | 42.00" | 0.00% | +13 mm | 60.0 mph | calculate → |
| 42x14.00R17 | 42.00" | 0.00% | -12 mm | 60.0 mph | calculate → |
| 42.5x13.50R17 | 42.50" | +1.19% | -25 mm | 60.7 mph | calculate → |
| 41x14.50R17 | 41.00" | -2.38% | 0 mm | 58.6 mph | calculate → |
| 43x14.50R17 | 43.00" | +2.38% | 0 mm | 61.4 mph | calculate → |
| 43x15.00R17 | 43.00" | +2.38% | +13 mm | 61.4 mph | calculate → |
| 40x12.50R17 | 40.00" | -4.76% | -50 mm | 57.1 mph | calculate → |
| 40x14.50R17 | 40.00" | -4.76% | 0 mm | 57.1 mph | calculate → |
| 40x16.00R17 | 40.00" | -4.76% | +38 mm | 57.1 mph | calculate → |
| 44x19.50R17 | 44.00" | +4.76% | +127 mm | 62.9 mph | calculate → |
| 44x21.00R17 | 44.00" | +4.76% | +165 mm | 62.9 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 | |
|---|---|---|---|---|---|
| 42x14.00R16 | 42.00" | 0.00% | -12 mm | 60.0 mph | calculate → |
| 42x15.00R16 | 42.00" | 0.00% | +13 mm | 60.0 mph | calculate → |
Try another size against 42x14.50R17
Questions
What size is 42x14.50R17 in inches?
42x14.50R17 is about 42.0" tall and 14.5" wide on a 17-inch rim — roughly a 370/85R17 in inch sizing.
What does 42x14.50R17 mean?
42" overall diameter, 14.50" section width, radial, 17" rim.
What tire sizes are equivalent to 42x14.50R17?
On the same 17" rim, within 3% of the diameter: 42x13.50R17 (0.00%), 42x14.00R17 (0.00%), 42x15.00R17 (0.00%), 42.5x13.50R17 (+1.19%), 41x14.50R17 (-2.38%), 43x14.50R17 (+2.38%).
How many revolutions per mile does a 42x14.50R17 tire make?
About 480 revolutions per mile (circumference 131.9").
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.