SidewallerTire & wheel calculators

185/55R16 vs 185/70R14

185/70R14 is 0.8% taller (+0.19 in) and the same width than 185/55R16.

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185/70R14 is 0.8% taller than 185/55R16. That is inside the ±3% most shops treat as a straight swap.

185/55R16185/70R14Change
Diameter24.01″24.20″+0.19″+0.8%
Width7.28″7.28″0.00″0.0%
Sidewall4.01″5.10″+1.09″+27.3%
Circumference75.4″76.0″+0.6″+0.8%
Wheel16″14″−2″
Revs per mile840834−6
SideTread
185/55R16185/70R14
Speedometer shows 60 mph60.5mph

Real speed on 185/70R14.

Ground clearance+0.09in

Change in height under the axle.

Width per side0.00in

On the same wheel, split inboard and outboard.

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185/55R16 or 185/70R14?

Can I use 185/70R14 instead of 185/55R16?

185/70R14 is 0.8% taller than 185/55R16. 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 185/70R14 you are really doing 60.5 mph if the speedometer was set up for 185/55R16. Going the other way, 185/55R16 would make it read 59.5 mph at a real 60.

How much ground clearance does it change?

Half the diameter difference: +0.09 in (+2 mm) under the axle.

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