265/65R17 vs 275/65R17
Diameter +1.68% · Speedo at 60 mph reads 61.0 mph actual · Ground clearance +6.5 mm
Generally safe — within the 3% tolerance
The diameter difference is ≤3%, which is the widely-accepted fitment tolerance for speedometer accuracy and ABS/traction-control calibration. Verify clearance and load rating with a tire professional before installing.
Speedometer effect
When the vehicle's speedometer (calibrated to 265/65R17) reads 60 mph, the actual speed with 275/65R17 mounted is:
Speedometer error: +1.67% · Odometer reads high by 1.67%
Full comparison
| Measurement | 265/65R17 | 275/65R17 | Delta |
|---|---|---|---|
| Overall diameter | 30.56" | 31.07" | +1.68% |
| Section width | 265 mm | 275 mm | +10 mm |
| Sidewall height | 172.25 mm | 178.75 mm | +6.50 mm |
| Rim diameter | 17" | 17" | +0" |
| Circumference | 2439 mm | 2480 mm | +41 mm |
| Revs / mile | 660 | 649 | -11 |
| Ground clearance change | +6.5 mm | ||
Questions about this swap
What is the diameter difference between 265/65R17 and 275/65R17?
275/65R17 is 1.68% larger in overall diameter than 265/65R17 — a difference of 13.0 mm (0.51 inches).
How does 275/65R17 affect the speedometer if the car was calibrated for 265/65R17?
When the speedometer reads 60 mph (calibrated for 265/65R17), the actual speed with 275/65R17 is 61.0 mph — an error of +1.67%.
Is it safe to replace 265/65R17 with 275/65R17?
Generally safe — within the 3% tolerance. The diameter difference is ≤3%, which is the widely-accepted fitment tolerance for speedometer accuracy and ABS/traction-control calibration. Verify clearance and load rating with a tire professional before installing.
All calculations use standard ETRTO formulas. Confirm fitment with a qualified tire professional and your vehicle's door-placard before purchasing.