Use the live comparison above to see the exact diameter, circumference, revs/mile, and speedometer error between 265/70R17 and 285/70R17. Change either size to explore a different pairing, or open the full Tire Size calculator to start from scratch.
Tire Size Comparison
265/70R17 vs 285/70R17
Diameter, circumference, revs/mile, and speedometer error for 265/70R17 vs 285/70R17, 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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265/70R17 vs 285/70R17: What Changes
Going from a 265/70R17 to a 285/70R17 is one of the most common first upsizes on a Tacoma, 4Runner, or Colorado: 20 mm more tread width and a touch more diameter for a modest lift in ground clearance. It usually clears with little to no trimming and only a small speedometer offset, which is why so many builders start here before committing to a 33 or 35.
Frequently Asked Questions
Will 285/70R17 fit without a lift?
On most mid-size trucks and SUVs a 285/70R17 clears at ride height and needs only minor liner or crash-bar trimming at full lock. Check your specific trim's bump-stop travel before committing.
Do I need to regear going from 265/70R17 to 285/70R17?
No. The diameter change here is only a few percent, well below the ~10% threshold where re-gearing is usually recommended, so factory gearing stays comfortable.