33x12.50R20 vs 35x12.50R20: full comparison
| Measurement | 33x12.50R20 | 35x12.50R20 | Difference |
|---|---|---|---|
| Diameter | 33.00 in | 35.00 in | +2.00 in+6.1% |
| Section width | 12.50 in | 12.50 in | 0.00 in0.0% |
| Sidewall height | 6.50 in | 7.50 in | +1.00 in+15.4% |
| Circumference | 103.67 in | 109.96 in | +6.28 in+6.1% |
| Revs per mile | 611 | 576 | −35−5.7% |
Speedometer: indicated vs actual speed
With 35x12.50R20 fitted where 33x12.50R20 was the stock/calibrated size:
| Speedometer shows | Actual speed | Difference |
|---|---|---|
| 20 mph | 21.2 mph | +1.2 mph |
| 30 mph | 31.8 mph | +1.8 mph |
| 40 mph | 42.4 mph | +2.4 mph |
| 50 mph | 53.0 mph | +3.0 mph |
| 55 mph | 58.3 mph | +3.3 mph |
| 60 mph | 63.6 mph | +3.6 mph |
| 65 mph | 68.9 mph | +3.9 mph |
| 70 mph | 74.2 mph | +4.2 mph |
| 75 mph | 79.5 mph | +4.5 mph |
| 80 mph | 84.8 mph | +4.8 mph |
Recalculate for a gear ratio change too →
Will 35x12.50R20 fit where 33x12.50R20 was?
At +6.1%, 35x12.50R20 is enough larger than 33x12.50R20 that it commonly needs some accommodation -- trimming plastic liners/fender edges, a spacer, or a leveling kit on trucks/SUVs going bigger. Check clearance at full steering lock and full suspension compression before buying.
Related tire size comparisons
- 275/55R20 vs 33x12.50R20
- 275/60R20 vs 33x12.50R20
- 295/65R20 vs 33x12.50R20
- 33x12.50R20 vs 305/55R20
- 33x12.50R20 vs 285/55R20
More tire tools
- Tire size comparison tool: compare any two sizes yourself, including flotation sizes.
- Tire size calculator: full dimensions of one size, plus every equivalent size within 3%.
- Speedometer calculator: true speed after a tire or gear ratio change.
Frequently asked questions
How much bigger is 35x12.50R20 than 33x12.50R20?
35x12.50R20 is 2.00 in taller in overall diameter (+6.1%) and 0.00 in the same width as in section width (0.0%) than 33x12.50R20.
Will 35x12.50R20 fit in place of 33x12.50R20?
At +6.1%, 35x12.50R20 is enough larger than 33x12.50R20 that it commonly needs some accommodation -- trimming plastic liners/fender edges, a spacer, or a leveling kit on trucks/SUVs going bigger. Check clearance at full steering lock and full suspension compression before buying.
Does swapping to 35x12.50R20 affect my speedometer?
With 35x12.50R20 fitted where 33x12.50R20 was calibrated, an indicated 60 mph is really about 63.6 mph. Beyond the ±3% guideline, plan to recalibrate the speedometer/odometer (with a programmer or at the dealer) for an accurate reading.
Does 35x12.50R20 change the ride height?
Yes -- half the diameter difference shows up at the axle, so 35x12.50R20 changes ride height by about 1.00 in higher compared with 33x12.50R20.
Do 33x12.50R20 and 35x12.50R20 use the same wheel (rim) diameter?
Yes -- both fit a 20 inch wheel, so only the tire itself changes, not the wheel.