275/70R18 vs 285/75R16Tire Size Comparison
The 1.0% diameter difference is within the accepted 3% tolerance.
Comparison Details
Speedometer Correction
When switching from 275/70R18 to 285/75R16, your speedometer will differ from actual speed.
| Speedometer | Actual Speed | Difference |
|---|---|---|
| 30 km/h | 29.7 km/h | -0.3 km/h |
| 40 km/h | 39.6 km/h | -0.4 km/h |
| 50 km/h | 49.5 km/h | -0.5 km/h |
| 60 km/h | 59.4 km/h | -0.6 km/h |
| 70 km/h | 69.3 km/h | -0.7 km/h |
| 80 km/h | 79.2 km/h | -0.8 km/h |
| 90 km/h | 89.1 km/h | -0.9 km/h |
| 100 km/h | 99.0 km/h | -1.0 km/h |
| 110 km/h | 108.9 km/h | -1.1 km/h |
| 120 km/h | 118.8 km/h | -1.2 km/h |
| 130 km/h | 128.7 km/h | -1.3 km/h |
Vehicles Using These Sizes
Vehicles with 275/70R18
Individual Tire Size Details
Practical Guidance
Switching from 275/70R18 to 285/75R16 is within the industry-accepted 3% diameter tolerance. Your speedometer, ABS, and traction control should function normally. Note: these sizes require different rim diameters (18" vs 16"), so you will need different wheels.
The 3% diameter tolerance is a widely accepted industry guideline referenced by the ETRTO and most vehicle manufacturers. When in doubt, consult your vehicle's owner's manual or a qualified tire professional. For U.S. tire safety standards and recalls, see the NHTSA Tire Safety page.
Frequently Asked Questions
Safe. The overall diameter differs by -0.99%, width changes by 10mm.
Speedometer error will be -0.99%. At an indicated 100 km/h, actual speed is about 99.0 km/h.
Ground clearance changes by -4.2mm per side.