SidewallerTire & wheel calculators

165/70R13 vs 185/70R13

185/70R13 is 5.0% taller (+1.10 in) and 0.79 in wider than 165/70R13.

Caution
Check before you buy

185/70R13 is 5.0% taller than 165/70R13. It often still fits, but expect a noticeable speedometer error and check clearance at full steering lock.

165/70R13185/70R13Change
Diameter22.09″23.20″+1.10″+5.0%
Width6.50″7.28″+0.79″+12.1%
Sidewall4.55″5.10″+0.55″+12.1%
Circumference69.4″72.9″+3.5″+5.0%
Wheel13″13″Same
Revs per mile913869−43
SideTread
165/70R13185/70R13
Speedometer shows 60 mph63.0mph

Real speed on 185/70R13.

Ground clearance+0.55in

Change in height under the axle.

Width per side+0.39in

On the same wheel, split inboard and outboard.

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165/70R13 or 185/70R13?

Can I use 185/70R13 instead of 165/70R13?

185/70R13 is 5.0% taller than 165/70R13. 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 185/70R13 you are really doing 63.0 mph if the speedometer was set up for 165/70R13. Going the other way, 165/70R13 would make it read 57.1 mph at a real 60.

How much ground clearance does it change?

Half the diameter difference: +0.55 in (+14 mm) under the axle.

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