35x12.50R17 vs 37x12.50R17: full comparison
| Measurement | 35x12.50R17 | 37x12.50R17 | Difference |
|---|---|---|---|
| Diameter | 35.00 in | 37.00 in | +2.00 in+5.7% |
| Section width | 12.50 in | 12.50 in | 0.00 in0.0% |
| Sidewall height | 9.00 in | 10.00 in | +1.00 in+11.1% |
| Circumference | 109.96 in | 116.24 in | +6.28 in+5.7% |
| Revs per mile | 576 | 545 | −31−5.4% |
Speedometer: indicated vs actual speed
With 37x12.50R17 fitted where 35x12.50R17 was the stock/calibrated size:
| Speedometer shows | Actual speed | Difference |
|---|---|---|
| 20 mph | 21.1 mph | +1.1 mph |
| 30 mph | 31.7 mph | +1.7 mph |
| 40 mph | 42.3 mph | +2.3 mph |
| 50 mph | 52.9 mph | +2.9 mph |
| 55 mph | 58.1 mph | +3.1 mph |
| 60 mph | 63.4 mph | +3.4 mph |
| 65 mph | 68.7 mph | +3.7 mph |
| 70 mph | 74.0 mph | +4.0 mph |
| 75 mph | 79.3 mph | +4.3 mph |
| 80 mph | 84.6 mph | +4.6 mph |
Recalculate for a gear ratio change too →
Will 37x12.50R17 fit where 35x12.50R17 was?
At +5.7%, 37x12.50R17 is enough larger than 35x12.50R17 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.
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Frequently asked questions
How much bigger is 37x12.50R17 than 35x12.50R17?
37x12.50R17 is 2.00 in taller in overall diameter (+5.7%) and 0.00 in the same width as in section width (0.0%) than 35x12.50R17.
Will 37x12.50R17 fit in place of 35x12.50R17?
At +5.7%, 37x12.50R17 is enough larger than 35x12.50R17 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 37x12.50R17 affect my speedometer?
With 37x12.50R17 fitted where 35x12.50R17 was calibrated, an indicated 60 mph is really about 63.4 mph. Beyond the ±3% guideline, plan to recalibrate the speedometer/odometer (with a programmer or at the dealer) for an accurate reading.
Does 37x12.50R17 change the ride height?
Yes -- half the diameter difference shows up at the axle, so 37x12.50R17 changes ride height by about 1.00 in higher compared with 35x12.50R17.
Do 35x12.50R17 and 37x12.50R17 use the same wheel (rim) diameter?
Yes -- both fit a 17 inch wheel, so only the tire itself changes, not the wheel.