185/55R16 vs 215/55R16
215/55R16 is 5.4% taller (+1.30 in) and 1.18 in wider than 185/55R16.
215/55R16 is 5.4% taller than 185/55R16. Beyond 5% you usually need a lift or leveling kit, a speedometer recalibration and sometimes new gears.
Real speed on 215/55R16.
Change in height under the axle.
On the same wheel, split inboard and outboard.
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185/55R16 or 215/55R16?
Can I use 215/55R16 instead of 185/55R16?
215/55R16 is 5.4% taller than 185/55R16. Beyond 5% you usually need a lift or leveling kit, a speedometer recalibration and sometimes new gears. 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 215/55R16 you are really doing 63.2 mph if the speedometer was set up for 185/55R16. Going the other way, 185/55R16 would make it read 56.9 mph at a real 60.
How much ground clearance does it change?
Half the diameter difference: +0.65 in (+17 mm) under the axle.