Use the live comparison above to see the exact diameter, circumference, revs/mile, and speedometer error between 33x12.5R17 and 35x12.5R17. Change either size to explore a different pairing, or open the full Tire Size calculator to start from scratch.
Tire Size Comparison
33x12.5R17 vs 35x12.5R17 (33s vs 35s)
Diameter, circumference, revs/mile, and speedometer error for 33x12.5R17 vs 35x12.5R17, 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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33x12.5R17 vs 35x12.5R17 (33s vs 35s): What Changes
"Should I run 33s or 35s?" is the perennial trail-rig question. Jumping from a 33x12.5R17 to a 35x12.5R17 adds a full two inches of diameter, roughly an inch of extra ground clearance, but almost always means a regear, and often a bigger lift, wider fenders, and re-checking your gearing and brakes. The exact diameter, revs-per-mile, and speedometer delta are below.
Frequently Asked Questions
Do 35s always require a regear?
Almost always. Moving from 33s to 35s is roughly a 6% diameter increase on top of whatever you already gained, and most drivetrains feel sluggish on 35s without dropping to a numerically higher axle ratio.
How much more clearance do 35s give over 33s?
About one inch at the axle centerline (half the two-inch diameter difference), plus the practical benefit of a larger contact patch and taller sidewall for airing down.