265/70R17 vs 265/75R17
Diameter +3.30% · Speedo at 60 mph reads 62.0 mph actual · Ground clearance +13.3 mm
Caution — review clearance and calibration
The 3–5% diameter difference may affect speedometer accuracy and ABS calibration noticeably. Fitment is possible on many vehicles but should be verified for wheel-well clearance and approved by a tire professional.
Speedometer effect
When the vehicle's speedometer (calibrated to 265/70R17) reads 60 mph, the actual speed with 265/75R17 mounted is:
Speedometer error: +3.30% · Odometer reads high by 3.30%
Full comparison
| Measurement | 265/70R17 | 265/75R17 | Delta |
|---|---|---|---|
| Overall diameter | 31.61" | 32.65" | +3.30% |
| Section width | 265 mm | 265 mm | +0 mm |
| Sidewall height | 185.5 mm | 198.75 mm | +13.25 mm |
| Rim diameter | 17" | 17" | +0" |
| Circumference | 2522 mm | 2605 mm | +83 mm |
| Revs / mile | 638 | 618 | -20 |
| Ground clearance change | +13.3 mm | ||
Questions about this swap
What is the diameter difference between 265/70R17 and 265/75R17?
265/75R17 is 3.30% larger in overall diameter than 265/70R17 — a difference of 26.5 mm (1.04 inches).
How does 265/75R17 affect the speedometer if the car was calibrated for 265/70R17?
When the speedometer reads 60 mph (calibrated for 265/70R17), the actual speed with 265/75R17 is 62.0 mph — an error of +3.30%.
Is it safe to replace 265/70R17 with 265/75R17?
Caution — review clearance and calibration. The 3–5% diameter difference may affect speedometer accuracy and ABS calibration noticeably. Fitment is possible on many vehicles but should be verified for wheel-well clearance and approved by a tire professional.
All calculations use standard ETRTO formulas. Confirm fitment with a qualified tire professional and your vehicle's door-placard before purchasing.