275/70R18 vs 295/70R18: full comparison
| Measurement | 275/70R18 | 295/70R18 | Difference |
|---|---|---|---|
| Diameter | 33.16 in | 34.26 in | +1.10 in+3.3% |
| Section width | 10.83 in | 11.61 in | +0.79 in+7.3% |
| Sidewall height | 7.58 in | 8.13 in | +0.55 in+7.3% |
| Circumference | 104.17 in | 107.63 in | +3.46 in+3.3% |
| Revs per mile | 608 | 589 | −20−3.2% |
Speedometer: indicated vs actual speed
With 295/70R18 fitted where 275/70R18 was the stock/calibrated size:
| Speedometer shows | Actual speed | Difference |
|---|---|---|
| 20 mph | 20.7 mph | +0.7 mph |
| 30 mph | 31.0 mph | +1.0 mph |
| 40 mph | 41.3 mph | +1.3 mph |
| 50 mph | 51.7 mph | +1.7 mph |
| 55 mph | 56.8 mph | +1.8 mph |
| 60 mph | 62.0 mph | +2.0 mph |
| 65 mph | 67.2 mph | +2.2 mph |
| 70 mph | 72.3 mph | +2.3 mph |
| 75 mph | 77.5 mph | +2.5 mph |
| 80 mph | 82.7 mph | +2.7 mph |
Recalculate for a gear ratio change too →
Will 295/70R18 fit where 275/70R18 was?
At +3.3%, 295/70R18 is enough larger than 275/70R18 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.
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 295/70R18 than 275/70R18?
295/70R18 is 1.10 in taller in overall diameter (+3.3%) and 0.79 in wider in section width (+7.3%) than 275/70R18.
Will 295/70R18 fit in place of 275/70R18?
At +3.3%, 295/70R18 is enough larger than 275/70R18 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 295/70R18 affect my speedometer?
With 295/70R18 fitted where 275/70R18 was calibrated, an indicated 60 mph is really about 62.0 mph. Beyond the ±3% guideline, plan to recalibrate the speedometer/odometer (with a programmer or at the dealer) for an accurate reading.
Does 295/70R18 change the ride height?
Yes -- half the diameter difference shows up at the axle, so 295/70R18 changes ride height by about 0.55 in higher compared with 275/70R18.
Do 275/70R18 and 295/70R18 use the same wheel (rim) diameter?
Yes -- both fit a 18 inch wheel, so only the tire itself changes, not the wheel.