Use the live comparison above to see the exact diameter, circumference, revs/mile, and speedometer error between 285/75R16 and 315/75R16. Change either size to explore a different pairing, or open the full Tire Size calculator to start from scratch.
Tire Size Comparison
285/75R16 vs 315/75R16
Diameter, circumference, revs/mile, and speedometer error for 285/75R16 vs 315/75R16, with a to-scale visual.
Metric (285/75R16) or inch (35x12.50R17)
Past +10% diameter, budget for a regear. Use the Gear Ratio calculator to check.
Tire Size Results
First Tire
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stock diameter
Second Tire
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new diameter
Speedo Error
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speedometer error
| Measurement | First | Second |
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285/75R16 vs 315/75R16: What Changes
On 16-inch wheels, favored on solid-axle trucks and older diesels, the 285/75R16 is a 33 and the 315/75R16 is a 35. This is the same 33-versus-35 decision as on 17s, but the taller sidewall of the 16-inch pairing gives even more cushion for airing down. Expect a regear and a fender check when stepping up to the 315.
Frequently Asked Questions
Is 315/75R16 a 35-inch tire?
Yes. A 315/75R16 is a nominal 34.6 inches and is universally referred to and sold as a 35 on 16-inch wheels.
Will 315/75R16 clear on my truck?
It depends on lift and backspacing. Most solid-axle trucks need a lift and appropriate wheel offset to run 315s without rubbing the fenders or frame at full lock.