265/70R16 vs 245/70R17 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

Well within tolerance

−0.33% diameter

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

Needs 17″ wheels: this tire does not fit your 16″ rims.
20 mm narrower: check the tire is approved for your rim width.

Tires in 245/70R17

Check price on Amazon · 245/70R17 Best-rated 245/70R17 tires

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Measurement	265/70R16	245/70R17	Diff	%
Overall diameter	30.61″777 mm	30.50″775 mm	−0.10″	−0.3%
Section width	265.0 mm	245.0 mm	−20.0 mm	−7.5%
Sidewall height	185.5 mm	171.5 mm	−14.0 mm	−7.5%
Rim diameter	16″	17″	+1″	+6.3%
Circumference	96.15″2442 mm	95.83″2434 mm	−0.32″	−0.3%
Revolutions per mileturns per distance; drives the odometer	659409 /km	661411 /km	+2	+0.3%
Ride height change	—	—	−0.05″ −1.3 mm

Speedometer reading

Speedo shows

60mph

97 km/h

Actual speed

59.8mph

96 km/h

Overlay

265/70R16245/70R17

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.