285/30R24 vs 285/35R23 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

+0.40% diameter

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

Needs 23″ wheels: this tire does not fit your 24″ rims.

Tires in 285/35R23

Check price on Amazon · 285/35R23 Best-rated 285/35R23 tires

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Measurement	285/30R24	285/35R23	Diff	%
Overall diameter	30.73″781 mm	30.85″784 mm	+0.12″	+0.4%
Section width	285.0 mm	285.0 mm	0.0 mm	0.0%
Sidewall height	85.5 mm	99.8 mm	+14.3 mm	+16.7%
Rim diameter	24″	23″	−1″	−4.2%
Circumference	96.55″2452 mm	96.93″2462 mm	+0.38″	+0.4%
Revolutions per mileturns per distance; drives the odometer	656408 /km	654406 /km	−3	−0.4%
Ride height change	—	—	+0.06″ +1.6 mm

Speedometer reading

Speedo shows

60mph

97 km/h

Actual speed

60.2mph

97 km/h

Overlay

285/30R24285/35R23

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.