215/75R15 vs 245/70R15 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

Within the usual 3% rule

+2.91% diameter

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

30 mm wider: check inner clearance and that your rims are wide enough.

Tires in 245/70R15

Check price on Amazon · 245/70R15 Best-rated 245/70R15 tires

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Measurement	215/75R15	245/70R15	Diff	%
Overall diameter	27.70″704 mm	28.50″724 mm	+0.81″	+2.9%
Section width	215.0 mm	245.0 mm	+30.0 mm	+14.0%
Sidewall height	161.3 mm	171.5 mm	+10.3 mm	+6.4%
Rim diameter	15″	15″	0″	0.0%
Circumference	87.01″2210 mm	89.55″2275 mm	+2.54″	+2.9%
Revolutions per mileturns per distance; drives the odometer	728452 /km	708440 /km	−21	−2.8%
Ride height change	—	—	+0.40″ +10.2 mm

Speedometer reading

Speedo shows

60mph

97 km/h

Actual speed

61.7mph

99 km/h

Overlay

215/75R15245/70R15

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.