SidewallerTire & wheel calculators

185/65R15 vs 195/65R15

195/65R15 is 2.1% taller (+0.51 in) and 0.39 in wider than 185/65R15.

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Close match

195/65R15 is 2.1% taller than 185/65R15. That is inside the ±3% most shops treat as a straight swap.

185/65R15195/65R15Change
Diameter24.47″24.98″+0.51″+2.1%
Width7.28″7.68″+0.39″+5.4%
Sidewall4.73″4.99″+0.26″+5.4%
Circumference76.9″78.5″+1.6″+2.1%
Wheel15″15″Same
Revs per mile824807−17
SideTread
185/65R15195/65R15
Speedometer shows 60 mph61.3mph

Real speed on 195/65R15.

Ground clearance+0.26in

Change in height under the axle.

Width per side+0.20in

On the same wheel, split inboard and outboard.

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185/65R15 or 195/65R15?

Can I use 195/65R15 instead of 185/65R15?

195/65R15 is 2.1% taller than 185/65R15. 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 195/65R15 you are really doing 61.3 mph if the speedometer was set up for 185/65R15. Going the other way, 185/65R15 would make it read 58.8 mph at a real 60.

How much ground clearance does it change?

Half the diameter difference: +0.26 in (+7 mm) under the axle.

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