205/55R16 vs 195/60R15 tire size comparison

Change either size and everything below updates.

Start from your car make, model, year
Current tire size
/R
xR
New tire size
/R
xR

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

205/55R16: 24.88″ (632 mm) tall, 8.07″ (205 mm) wide, sidewall 4.44″ (113 mm) — 811 revolutions per mile.

Within the usual 3% rule

−2.67% diameter

Most fitment guides accept up to 3%. Check clearance at full lock and full suspension compression before committing.

  • Needs 15″ wheels: this tire does not fit your 16″ rims.
  • 10 mm narrower: check the tire is approved for your rim width.

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Measurement205/55R16195/60R15Diff%
Overall diameter24.88″632 mm24.21″615 mm−0.67″−2.7%
Section width205.0 mm195.0 mm−10.0 mm−4.9%
Sidewall height112.8 mm117.0 mm+4.3 mm+3.8%
Rim diameter16″15″−1″−6.3%
Circumference78.16″1985 mm76.07″1932 mm−2.09″−2.7%
Revolutions per mileturns per distance; drives the odometer811504 /km833518 /km+22+2.7%
Ride height change——−0.33″ −8.4 mm

Speedometer reading

Speedo shows
60mph
97 km/h
Actual speed
58.4mph
94 km/h

Overlay

205/55R16195/60R15

Plus sizing: 205/55R16 on smaller or bigger wheels

Sizes fitted to cars that keep the overall diameter within 3% of 205/55R16 on a rim one inch smaller or up to two inches bigger, closest first.

RimSizeDiameterChangeCompare
R15 (−1) 195/65R15 24.98″ +0.4% Compare
205/60R15 24.69″ −0.8% Compare
R17 (+1) 205/50R17 25.07″ +0.8% Compare
225/45R17 24.97″ +0.4% Compare
R18 (+2) 215/40R18 24.77″ −0.4% Compare
225/40R18 25.09″ +0.8% Compare

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.

Changing wheels too? The wheel offset calculator shows how far a new wheel width and offset move the tire toward the suspension and the fender.

Reading a tire size

225/45R17
225
Section width in millimetres
45
Aspect ratio — sidewall height as a % of width
R
Radial construction
17
Rim diameter in inches

Full guide to the tire sidewall →

Sizes often compared with 205/55R16