SidewallerTire & wheel calculators

225/55R19 vs 285/35R21

285/35R21 is 0.4% taller (+0.11 in) and 2.36 in wider than 225/55R19.

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Close match

285/35R21 is 0.4% taller than 225/55R19. That is inside the ±3% most shops treat as a straight swap.

225/55R19285/35R21Change
Diameter28.74″28.85″+0.11″+0.4%
Width8.86″11.22″+2.36″+26.7%
Sidewall4.87″3.93″−0.94″−19.4%
Circumference90.3″90.6″+0.3″+0.4%
Wheel19″21″+2″
Revs per mile702699−3
SideTread
225/55R19285/35R21
Speedometer shows 60 mph60.2mph

Real speed on 285/35R21.

Ground clearance+0.06in

Change in height under the axle.

Width per side+1.18in

On the same wheel, split inboard and outboard.

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225/55R19 or 285/35R21?

Can I use 285/35R21 instead of 225/55R19?

285/35R21 is 0.4% taller than 225/55R19. 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 285/35R21 you are really doing 60.2 mph if the speedometer was set up for 225/55R19. Going the other way, 225/55R19 would make it read 59.8 mph at a real 60.

How much ground clearance does it change?

Half the diameter difference: +0.06 in (+1 mm) under the axle.

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