185/65R14 vs 205/55R16 tire size comparison

Change either size and everything below updates.

Start from your car make, model, year

Make Model Year

Width/AspectRRim

DiameterxWidthRRim

Width/AspectRRim

DiameterxWidthRRim

Width in mm · aspect = sidewall height as a % of width · rim in inches

Flotation (LT) sizes, all in inches: overall diameter × section width, then rim

Outside the 3% rule

+6.01% diameter

This exceeds the tolerance most manufacturers allow. Expect speedometer error, possible rubbing, and on some cars ABS or stability-control faults.

Needs 16″ wheels: this tire does not fit your 14″ rims.
20 mm wider: check inner clearance and that your rims are wide enough.

Check what fits your car Factory tire sizes for every make, model and year.

Tires in 205/55R16

Check price on Amazon · 205/55R16 Best-rated 205/55R16 tires

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Measurement	185/65R14	205/55R16	Diff	%
Overall diameter	23.47″596 mm	24.88″632 mm	+1.41″	+6.0%
Section width	185.0 mm	205.0 mm	+20.0 mm	+10.8%
Sidewall height	120.3 mm	112.8 mm	−7.5 mm	−6.2%
Rim diameter	14″	16″	+2″	+14.3%
Circumference	73.73″1873 mm	78.16″1985 mm	+4.43″	+6.0%
Revolutions per mileturns per distance; drives the odometer	859534 /km	811504 /km	−49	−5.7%
Ride height change	—	—	+0.70″ +17.9 mm

Speedometer reading

Speedo shows

60mph

97 km/h

Actual speed

63.6mph

102 km/h

Overlay

185/65R14205/55R16

How to use the tire size calculator

Put your current tire size — width, aspect ratio and rim diameter — into the first form, then your desired size into the second. You’ll get the difference between the new and the old size, plus the speedometer reading difference and your actual speed on the new set. Both metric and flotation (LT inch) sizes are supported.

The calculator helps you decide whether a set of tires and wheels will fit your car. To compare tires by brand and model instead, use our tire comparison tool; to look up factory sizes, browse by car make.