TireSizesFinder

265/65R17 vs 285/65R17

285/65R17 is 1.02 in (26.0 mm) taller than 265/65R17, a +3.35% diameter difference. With the speedometer set for 265/65R17, an indicated 60 mph is 62.0 mph on 285/65R17.

Is this a safe swap?

Diameter difference +3.35%: outside the ±3% guideline

By overall diameter alone, 285/65R17 falls outside the ±3% range commonly used as a guideline when replacing 265/65R17; speedometer and ride-height changes are larger. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 265/65R17 (30.56 in) vs 285/65R17 (31.59 in)265/65R1730.56 in × 10.43 in285/65R1731.59 in × 11.22 in
Side profile and tread width, drawn to the same scale.
265/65R17 vs 285/65R17 differences
Measurement265/65R17285/65R17Difference% diff
Overall diameter30.56 in (776.3 mm)31.59 in (802.3 mm)+1.02 in (+26.0 mm)+3.35%
Sidewall height6.78 in (172.3 mm)7.29 in (185.3 mm)+0.51 in (+13.0 mm)+7.55%
Section width10.43 in (265.0 mm)11.22 in (285.0 mm)+0.79 in (+20.0 mm)+7.55%
Circumference96.02 in (2,438.8 mm)99.23 in (2,520.5 mm)+3.22 in (+81.7 mm)+3.35%
Revolutions per mile660639−21−3.24%
True speed with the speedometer calibrated for 265/65R17
IndicatedActual on 265/65R17Actual on 285/65R17Difference
30 mph30.0 mph31.0 mph+1.0 mph
60 mph60.0 mph62.0 mph+2.0 mph
75 mph75.0 mph77.5 mph+2.5 mph

Ride-height change: 285/65R17 raises the vehicle by 0.51 in (13.0 mm) at the axle (half the +26.0 mm diameter difference).

285/65R17 is 1.02 in taller than 265/65R17 and 20 mm wider, a 3.35% difference in overall diameter.

With the speedometer calibrated for 265/65R17, an indicated 60 mph is actually 62.0 mph on 285/65R17, and revolutions per mile change from 660 to 639.

Both sizes mount on 17-inch wheels.

Size pages

Other comparisons with 265/65R17

Other comparisons with 285/65R17

Source: Calculated from standard tire geometry formulas. Verified . How these numbers are calculated.