SidewallerTire & wheel calculators

285/45R22 vs 275/70R17

275/70R17 is 0.2% taller (+0.06 in) and 0.39 in narrower than 285/45R22.

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Close match

275/70R17 is 0.2% taller than 285/45R22. That is inside the ±3% most shops treat as a straight swap.

285/45R22275/70R17Change
Diameter32.10″32.16″+0.06″+0.2%
Width11.22″10.83″−0.39″−3.5%
Sidewall5.05″7.58″+2.53″+50.1%
Circumference100.8″101.0″+0.2″+0.2%
Wheel22″17″−5″
Revs per mile628627−1
SideTread
285/45R22275/70R17
Speedometer shows 60 mph60.1mph

Real speed on 275/70R17.

Ground clearance+0.03in

Change in height under the axle.

Width per side−0.20in

On the same wheel, split inboard and outboard.

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285/45R22 or 275/70R17?

Can I use 275/70R17 instead of 285/45R22?

275/70R17 is 0.2% taller than 285/45R22. That is inside the ±3% most shops treat as a straight swap. Also match or beat the original load index and speed rating, and check that the wheel width suits the new tire.

Will my speedometer be off?

At an indicated 60 mph on 275/70R17 you are really doing 60.1 mph if the speedometer was set up for 285/45R22. Going the other way, 285/45R22 would make it read 59.9 mph at a real 60.

How much ground clearance does it change?

Half the diameter difference: +0.03 in (+1 mm) under the axle.

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