195/75R15 vs 195/80R14 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

195/75R15: 26.52″ (674 mm) tall, 7.68″ (195 mm) wide, sidewall 5.76″ (146 mm) — 761 revolutions per mile.

Well within tolerance

−0.88% diameter

The overall diameter changes by less than 1.5%, so speedometer error is negligible and ride height barely moves.

  • Needs 14″ wheels: this tire does not fit your 15″ rims.

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Measurement195/75R15195/80R14Diff%
Overall diameter26.52″674 mm26.28″668 mm−0.23″−0.9%
Section width195.0 mm195.0 mm0.0 mm0.0%
Sidewall height146.3 mm156.0 mm+9.8 mm+6.7%
Rim diameter15″14″−1″−6.7%
Circumference83.30″2116 mm82.57″2097 mm−0.73″−0.9%
Revolutions per mileturns per distance; drives the odometer761473 /km767477 /km+7+0.9%
Ride height change——−0.12″ −3.0 mm

Speedometer reading

Speedo shows
60mph
97 km/h
Actual speed
59.5mph
96 km/h

Overlay

195/75R15195/80R14

Plus sizing: 195/75R15 on smaller or bigger wheels

Sizes fitted to cars that keep the overall diameter within 3% of 195/75R15 on a rim one inch smaller or up to two inches bigger, closest first.

RimSizeDiameterChangeCompare
R14 (−1) 195/80R14 26.28″ −0.9% Compare
225/70R14 26.40″ −0.4% Compare
R16 (+1) 205/65R16 26.49″ −0.1% Compare
195/70R16 26.75″ +0.9% Compare
R17 (+2) 205/60R17 26.69″ +0.6% Compare
195/60R17 26.21″ −1.1% 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 →