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275/65R17 vs 285/70R17

285/70R17 is 1.8″ taller than 275/65R17 on average, going by the heights their makers list (31.1″ vs 32.9″). On paper the gap is 1.63″.

275/65R17 and 285/70R17 drawn to the same scale: 31.1 and 32.9 inches tall on average as listed275/65R1731.1″285/70R1732.9″+1.8″
Drawn to the same scale, using the average height the makers list for each size.

What changes

Going from 275/65R17 to 285/70R17.

Lift+0.88″
Width+0.39″
Speedometer5.6% slow

Lift is half the height difference, since the axle sits at the middle of the tire. The speedometer figure assumes it was set for 275/65R17 and uses the revolutions per mile the makers publish: at an indicated 60 mph you'd be doing 63.3 mph.

Side by side

275/65R17285/70R17Difference
Listed height ″31.1032.70–33.15+1.76
Size code height ″31.0732.71+1.63
Height under load ″30.231.8+1.7
Width ″10.8311.22+0.39
Listed width ″11.011.4–11.6+0.5
Sidewall ″7.047.85+0.82
Wheel ″1717same
Weight lb43.7–55.546.0–65.7+7.1
Tread depth /32″14–1513–19+2.2
Tires listed236

All 31-inch tire sizes · All 33-inch tire sizes

Tires sold in both sizes

The same model in each size, by the heights the maker lists. Averages where a model comes in several load ranges.

Tire275/65R17 ″285/70R17 ″Taller byHeavier by
BFGoodrich All-Terrain T/A KO331.1032.80+1.70″+0.4 lb

Questions about 275/65R17 vs 285/70R17

How much taller is 285/70R17 than 275/65R17?

1.76″ on average, going by the heights tire makers list: 275/65R17 tires are listed at 31.10″ and 285/70R17 at 32.70–33.15″. The size codes work out to 31.07″ and 32.71″, a 1.63″ difference.

How much lift does 285/70R17 give over 275/65R17?

The tire's radius grows by 0.88″, so the axle sits about 0.88″ higher, and the top of the tread comes 0.88″ closer to the fender. 285/70R17 is also 0.39″ wider on paper, 0.20″ per side on the same wheel. Whether it fits depends on your vehicle, lift and wheel offset.

Will my speedometer be off with 285/70R17 instead of 275/65R17?

Yes. If it's set for 275/65R17, it will read about 5.6% slow: at an indicated 60 mph you'll be doing 63.3 mph. Worked out from the revolutions per mile the makers publish.

Can 285/70R17 go on the same wheel as 275/65R17?

Both fit a 17-inch wheel. Wheel widths approved for both run from 7.5″ to 9.5″.