285/75R17 vs 295/70R17

285/75R17 is 0.6" taller than 295/70R17 (1.7%)

Diameter difference−1.69%diameter 33.83" → 33.26"
285/75R17295/70R17
285/75R17295/70R17Difference
Overall diameter33.83"33.26"−0.57"
Section width11.22"11.61"+0.39"
Sidewall height8.42"8.13"−0.29"
Circumference106.3"104.5"−1.8"
Revolutions per mile596606+10
Wheel diameter17"17"±0"

Speedometer

ShowsActualDiff
30 mph29.5 mph−0.5
45 mph44.2 mph−0.8
60 mph59.0 mph−1.0
70 mph68.8 mph−1.2
80 mph78.7 mph−1.3

Gear ratio to match

CurrentEquivalent
3.423.36
3.553.49
3.733.67
4.104.03

295/70R17 is 0.57" shorter than 285/75R17, a −1.69% change in diameter, inside the 3% range most shops treat as a safe swap.

Ground clearance changes by 0.29" (half the diameter change), and the tire needs 0.29" less room above it.

295/70R17 is 0.39" wider. On the same wheel offset about half of that, 0.20", moves toward the suspension and half toward the fender.

Both fit a 17" wheel; the sidewall is 0.29" shorter on 295/70R17.

Details: 285/75R17 in inches · 295/70R17 in inches · change sizes in the calculator

FAQ

What is the difference between 285/75R17 and 295/70R17?

295/70R17 is 0.57" shorter (−1.69%) and 0.39" wider than 285/75R17.

Will 295/70R17 change my speedometer?

Yes, by −1.69%. When the speedometer shows 60 mph you would be going 59.0 mph.

Can I replace 285/75R17 with 295/70R17?

Often yes: the diameter change of −1.7% is within the common 3% guideline. Check the load index, speed rating and clearance.