185/55R16 vs 225/50R16
225/50R16 is 3.5% taller (+0.85 in) and 1.57 in wider than 185/55R16.
225/50R16 is 3.5% taller than 185/55R16. It often still fits, but expect a noticeable speedometer error and check clearance at full steering lock.
Real speed on 225/50R16.
Change in height under the axle.
On the same wheel, split inboard and outboard.
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185/55R16 or 225/50R16?
Can I use 225/50R16 instead of 185/55R16?
225/50R16 is 3.5% taller than 185/55R16. It often still fits, but expect a noticeable speedometer error and check clearance at full steering lock. 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 225/50R16 you are really doing 62.1 mph if the speedometer was set up for 185/55R16. Going the other way, 185/55R16 would make it read 58.0 mph at a real 60.
How much ground clearance does it change?
Half the diameter difference: +0.42 in (+11 mm) under the axle.