SidewallerTire & wheel calculators

175/70R14 vs 185/70R14

185/70R14 is 2.3% taller (+0.55 in) and 0.39 in wider than 175/70R14.

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Close match

185/70R14 is 2.3% taller than 175/70R14. That is inside the ±3% most shops treat as a straight swap.

175/70R14185/70R14Change
Diameter23.65″24.20″+0.55″+2.3%
Width6.89″7.28″+0.39″+5.7%
Sidewall4.82″5.10″+0.28″+5.7%
Circumference74.3″76.0″+1.7″+2.3%
Wheel14″14″Same
Revs per mile853834−19
SideTread
175/70R14185/70R14
Speedometer shows 60 mph61.4mph

Real speed on 185/70R14.

Ground clearance+0.28in

Change in height under the axle.

Width per side+0.20in

On the same wheel, split inboard and outboard.

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175/70R14 or 185/70R14?

Can I use 185/70R14 instead of 175/70R14?

185/70R14 is 2.3% taller than 175/70R14. 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 61.4 mph if the speedometer was set up for 175/70R14. Going the other way, 175/70R14 would make it read 58.6 mph at a real 60.

How much ground clearance does it change?

Half the diameter difference: +0.28 in (+7 mm) under the axle.

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