SidewallerTire & wheel calculators

195/50R15 vs 185/65R15

185/65R15 is 7.9% taller (+1.79 in) and 0.39 in narrower than 195/50R15.

Large
Big change

185/65R15 is 7.9% taller than 195/50R15. Beyond 5% you usually need a lift or leveling kit, a speedometer recalibration and sometimes new gears.

195/50R15185/65R15Change
Diameter22.68″24.47″+1.79″+7.9%
Width7.68″7.28″−0.39″−5.1%
Sidewall3.84″4.73″+0.90″+23.3%
Circumference71.2″76.9″+5.6″+7.9%
Wheel15″15″Same
Revs per mile889824−65
SideTread
195/50R15185/65R15
Speedometer shows 60 mph64.7mph

Real speed on 185/65R15.

Ground clearance+0.90in

Change in height under the axle.

Width per side−0.20in

On the same wheel, split inboard and outboard.

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195/50R15 or 185/65R15?

Can I use 185/65R15 instead of 195/50R15?

185/65R15 is 7.9% taller than 195/50R15. Beyond 5% you usually need a lift or leveling kit, a speedometer recalibration and sometimes new gears. 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 185/65R15 you are really doing 64.7 mph if the speedometer was set up for 195/50R15. Going the other way, 195/50R15 would make it read 55.6 mph at a real 60.

How much ground clearance does it change?

Half the diameter difference: +0.90 in (+23 mm) under the axle.

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