285/65R17 vs 265/70R17

265/70R17 is 0.0" taller than 285/65R17 (0.1%)

Diameter difference+0.06%diameter 31.59" → 31.61"
285/65R17265/70R17
285/65R17265/70R17Difference
Overall diameter31.59"31.61"+0.02"
Section width11.22"10.43"−0.79"
Sidewall height7.29"7.30"+0.01"
Circumference99.2"99.3"+0.1"
Revolutions per mile639638−0
Wheel diameter17"17"±0"

Speedometer

ShowsActualDiff
30 mph30.0 mph+0.0
45 mph45.0 mph+0.0
60 mph60.0 mph+0.0
70 mph70.0 mph+0.0
80 mph80.0 mph+0.0

Gear ratio to match

CurrentEquivalent
3.423.42
3.553.55
3.733.73
4.104.10

265/70R17 is 0.02" taller than 285/65R17, a +0.06% change in diameter, inside the 3% range most shops treat as a safe swap.

Ground clearance changes by 0.01" (half the diameter change), and the tire needs 0.01" more room above it.

285/65R17 is 0.79" wider. On the same wheel offset about half of that, 0.39", moves toward the suspension and half toward the fender.

Both fit a 17" wheel; the sidewall is 0.01" taller on 265/70R17.

Details: 285/65R17 in inches · 265/70R17 in inches · change sizes in the calculator

FAQ

What is the difference between 285/65R17 and 265/70R17?

265/70R17 is 0.02" taller (+0.06%) and 0.79" narrower than 285/65R17.

Will 265/70R17 change my speedometer?

Yes, by +0.06%. When the speedometer shows 60 mph you would be going 60.0 mph.

Can I replace 285/65R17 with 265/70R17?

Often yes: the diameter change of +0.1% is within the common 3% guideline. Check the load index, speed rating and clearance.